使用(yong)單位(wei)或經(jing)(jing)銷商(shang)在日常采購(gou)中使用(yong)搜索(suo)(suo)引擎搜索(suo)(suo)生(sheng)產(chan)(chan)(chan)(chan)廠商(shang)并購(gou)買產(chan)(chan)(chan)(chan)品(pin)(pin)已(yi)經(jing)(jing)成為(wei)很多企業(ye)(ye)(ye)和經(jing)(jing)銷商(shang)的(de)(de)主要采購(gou)手段。根(gen)據我們從事網絡營(ying)銷的(de)(de)經(jing)(jing)歷，總結出(chu)以下幾點注意事項，希望能對采購(gou)的(de)(de)企業(ye)(ye)(ye)起到一(yi)些幫助作用(yong)。1、采購(gou)的(de)(de)產(chan)(chan)(chan)(chan)品(pin)(pin)型號規格、質量(liang)標準、技術參數應與采購(gou)計劃相符。2、采購(gou)產(chan)(chan)(chan)(chan)品(pin)(pin)時，就是(shi)通過搜索(suo)(suo)引擎搜索(suo)(suo)自(zi)己需求的(de)(de)產(chan)(chan)(chan)(chan)品(pin)(pin)，找(zhao)出(chu)生(sheng)產(chan)(chan)(chan)(chan)和銷售該(gai)產(chan)(chan)(chan)(chan)品(pin)(pin)的(de)(de)企業(ye)(ye)(ye)，然后查看該(gai)生(sheng)產(chan)(chan)(chan)(chan)企業(ye)(ye)(ye)網站是(shi)否(fou)經(jing)(jing)過其所在省份(fen)工信廳備案，并登錄(lu)查驗。3、查看該(gai)生(sheng)產(chan)(chan)(chan)(chan)企業(ye)(ye)(ye)網站欄目(mu)配置(zhi)、欄目(mu)內(nei)容是(shi)否(fou)足夠專業(ye)(ye)(ye)，如(ru)大量(liang)出(chu)現與采購(gou)產(chan)(chan)(chan)(chan)品(pin)(pin)無關、雜亂無章(zhang)的(de)(de)，聯系地址標明xxx工業(ye)(ye)(ye)區、示(shi)范園(yuan)而(er)沒有路牌號的(de)(de)，只有手機號碼而(er)沒有固定(ding)電話(hua)、傳真(zhen)地的(de)(de)，足可認定(ding)該(gai)生(sheng)產(chan)(chan)(chan)(chan)企業(ye)(ye)(ye)為(wei)非正規的(de)(de)家庭作坊，不宜(yi)作為(wei)采購(gou)對象。

采用(yong)(yong)一(yi)種(zhong)抗(kang)靜電阻燃的(de)(de)特種(zhong)塑(su)料管(guan)、異形雙槽聚能(neng)管(guan)，根據炮眼(yan)(yan)深度可(ke)長可(ke)短。是兩個相似半(ban)(ban)壁管(guan)組成(cheng)，半(ban)(ban)壁管(guan)中央有(you)個凹進(jin)去的(de)(de)槽叫做'聚能(neng)槽"，使(shi)用(yong)(yong)聚能(neng)管(guan)光面爆(bao)(bao)破(po)成(cheng)型效(xiao)果好，開挖輪廓線平順整齊，圍(wei)巖擾動減(jian)少、超(chao)欠挖明(ming)顯改善，有(you)利于支護工(gong)(gong)(gong)序施工(gong)(gong)(gong)，同時混凝土(tu)回(hui)填成(cheng)本大為降低(di)。鑿孔率減(jian)少30%，大大降低(di)了(le)爆(bao)(bao)破(po)作業工(gong)(gong)(gong)班的(de)(de)勞動量:鉆孔縮(suo)短30分鐘、少打眼(yan)(yan)、出渣量減(jian)少，降低(di)了(le)材料成(cheng)本、減(jian)少工(gong)(gong)(gong)時消耗、勞動效(xiao)率明(ming)顯提高，周邊眼(yan)(yan)爆(bao)(bao)破(po)成(cheng)本降低(di)30%以上，半(ban)(ban)眼(yan)(yan)痕保留率高達85%以上。pvc爆(bao)(bao)破(po)聚能(neng)管(guan)主要(yao)應用(yong)(yong)于隧道(dao)、煤礦、鐵礦等需要(yao)進(jin)行光面爆(bao)(bao)破(po)施工(gong)(gong)(gong)的(de)(de)工(gong)(gong)(gong)程。采用(yong)(yong)聚能(neng)管(guan)的(de)(de)光面爆(bao)(bao)破(po)可(ke)減(jian)少鉆孔，擴大孔距，減(jian)少導爆(bao)(bao)管(guan)用(yong)(yong)量，減(jian)少超(chao)挖，減(jian)少噴(pen)漿，提高半(ban)(ban)孔率，既節省了(le)成(cheng)本又提高了(le)施工(gong)(gong)(gong)效(xiao)率。

不成功的(de)(de)事例是(shi)(shi)有(you)的(de)(de)，如(ru)爆(bao)(bao)(bao)而不倒、實(shi)施定(ding)向爆(bao)(bao)(bao)破(po)(po)后沒有(you)按爆(bao)(bao)(bao)破(po)(po)方(fang)案(an)的(de)(de)方(fang)向倒塌(ta)等(deng)等(deng)。這些(xie)事例警示:從爆(bao)(bao)(bao)破(po)(po)設(she)計、爆(bao)(bao)(bao)破(po)(po)器(qi)(qi)材(cai)質量(liang)、爆(bao)(bao)(bao)破(po)(po)施工(gong)到(dao)起(qi)爆(bao)(bao)(bao)網(wang)路(lu)連接等(deng)，只要(yao)有(you)一個(ge)環節出現失(shi)誤，都將影(ying)響爆(bao)(bao)(bao)破(po)(po)工(gong)程的(de)(de)效果，乃至(zhi)造(zao)成嚴重的(de)(de)后果。爆(bao)(bao)(bao)破(po)(po)作業無(wu)論是(shi)(shi)老舊建(jian)(jian)筑(zhu)物(wu)本身還是(shi)(shi)周(zhou)圍環境都十分復雜，這不僅要(yao)求(qiu)(qiu)認真(zhen)調查爆(bao)(bao)(bao)破(po)(po)體(ti)的(de)(de)結(jie)構(gou)(包括施工(gong)缺(que)陷)，分析(xi)受(shou)力狀況，同(tong)時還要(yao)對(dui)采取技術措施(如(ru)預(yu)處理、嵌(qian)補、支撐等(deng))的(de)(de)可靠(kao)和(he)安全(quan)性(xing)進行分析(xi)，對(dui)可能出現的(de)(de)意(yi)外情(qing)況，應預(yu)先制定(ding)應急(ji)方(fang)案(an)，努力避免安全(quan)事故和(he)不必要(yao)的(de)(de)損失(shi)。工(gong)程的(de)(de)環保(bao)(bao)性(xing)越來(lai)越受(shou)到(dao)人們的(de)(de)關注(zhu)，同(tong)時，探索無(wu)公害的(de)(de)拆除(chu)爆(bao)(bao)(bao)破(po)(po)技術，一直是(shi)(shi)爆(bao)(bao)(bao)破(po)(po)工(gong)作者追(zhui)求(qiu)(qiu)的(de)(de)目(mu)標。設(she)立(li)(li)掩蔽體(ti)對(dui)物(wu)體(ti)加以保(bao)(bao)護，簡(jian)單的(de)(de)辦法是(shi)(shi)用(yong)草(cao)袋、竹笆一類材(cai)料(liao)覆蓋在需要(yao)保(bao)(bao)護的(de)(de)物(wu)體(ti)上面;對(dui)房屋(wu)和(he)機器(qi)(qi)設(she)備常要(yao)在迎(ying)面和(he)頂部豎立(li)(li)排架，用(yong)木板或(huo)荊笆上罩鐵絲網(wang)，抵(di)御較多的(de)(de)飛石和(he)較強的(de)(de)空氣沖(chong)擊波的(de)(de)打(da)擊;對(dui)某些(xie)重要(yao)工(gong)程的(de)(de)建(jian)(jian)筑(zhu)物(wu)打(da)防震孔或(huo)者用(yong)預(yu)裂爆(bao)(bao)(bao)破(po)(po)將爆(bao)(bao)(bao)破(po)(po)區和(he)被保(bao)(bao)護的(de)(de)建(jian)(jian)筑(zhu)物(wu)或(huo)工(gong)程設(she)施隔離開來(lai)。

水(shui)(shui)(shui)(shui)壓(ya)光(guang)面爆(bao)(bao)破(po)較水(shui)(shui)(shui)(shui)壓(ya)光(guang)面爆(bao)(bao)破(po)，在周邊眼單(dan)循(xun)(xun)環火(huo)工品(pin)使(shi)用(yong)(yong)量上節(jie)約(yue)(yue)費用(yong)(yong)8.3%，周邊眼鉆孔數量從39個下降為(wei)23個費用(yong)(yong)節(jie)約(yue)(yue)41%，混凝土噴射每延米節(jie)約(yue)(yue)1.37立方米。水(shui)(shui)(shui)(shui)壓(ya)光(guang)面爆(bao)(bao)破(po)比水(shui)(shui)(shui)(shui)壓(ya)光(guang)面爆(bao)(bao)破(po)每循(xun)(xun)環節(jie)約(yue)(yue)費用(yong)(yong)258.4元，即每延米節(jie)約(yue)(yue)76較元，節(jie)約(yue)(yue)費用(yong)(yong)比例達32%。此外，聚(ju)(ju)(ju)能(neng)(neng)管(guan)(guan)水(shui)(shui)(shui)(shui)壓(ya)光(guang)面爆(bao)(bao)破(po)能(neng)(neng)有效降低隧道內石渣(zha)塊(kuai)度和粉(fen)塵含量，還可(ke)使(shi)通風時間(jian)有效縮短33%。聚(ju)(ju)(ju)能(neng)(neng)管(guan)(guan)光(guang)面爆(bao)(bao)破(po)工藝技(ji)(ji)術很成熟、可(ke)操(cao)作性很強、材料成本很低、施(shi)工速度很快、節(jie)能(neng)(neng)環保(bao)效果(guo)很顯著、經濟效益(yi)社會效益(yi)很高。聚(ju)(ju)(ju)能(neng)(neng)管(guan)(guan)定向爆(bao)(bao)破(po)技(ji)(ji)術是(shi)近幾年(nian)發展(zhan)(zhan)起來的一(yi)項掘進新技(ji)(ji)術,這種爆(bao)(bao)破(po)技(ji)(ji)術與傳統的光(guang)面爆(bao)(bao)破(po)技(ji)(ji)術有一(yi)定的差別,聚(ju)(ju)(ju)能(neng)(neng)管(guan)(guan)定向爆(bao)(bao)破(po)原理是(shi)在巷道周邊眼中(zhong),將炸裝在聚(ju)(ju)(ju)能(neng)(neng)管(guan)(guan)中(zhong)起爆(bao)(bao),爆(bao)(bao)破(po)時利用(yong)(yong)聚(ju)(ju)(ju)能(neng)(neng)管(guan)(guan)的聚(ju)(ju)(ju)能(neng)(neng)作用(yong)(yong),以減少裂隙的數量和控(kong)制優勢裂隙的發展(zhan)(zhan)方向。

專用o型聚能管聚能包由炸、形罩、隔板、殼體、引信和支架等部分組成，其作用及對聚能包威力的影響分述如下。1．炸，炸是聚能管爆破的能源，炸的爆壓越大，聚能彈威力越大；為得到高爆壓，需高爆速、高密度的炸。常用炸有梯恩梯、8321炸等，裝方法有熔鑄，塑裝和壓裝多種。2．型罩，型罩的作用是把炸的爆炸能轉化成罩體材料的射流動能，從而提高其穿透和切割能力。o型聚能管廠家型(xing)(xing)罩的(de)(de)(de)材(cai)(cai)料必須滿足(zu)四點要求，即可壓縮性(xing)小、密(mi)度高、塑性(xing)和(he)延展性(xing)好(hao)(hao)，在(zai)形(xing)(xing)(xing)(xing)(xing)(xing)成射流中(zhong)(zhong)不汽化。大(da)量(liang)試驗證(zheng)明，用紫銅制作型(xing)(xing)罩效果(guo)好(hao)(hao)，其次(ci)為鑄(zhu)鐵、鋼和(he)陶瓷。型(xing)(xing)罩的(de)(de)(de)形(xing)(xing)(xing)(xing)(xing)(xing)狀多種(zhong)多樣，主要有軸對稱(cheng)(cheng)(cheng)型(xing)(xing)，如圓錐形(xing)(xing)(xing)(xing)(xing)(xing)、半(ban)球(qiu)形(xing)(xing)(xing)(xing)(xing)(xing)、拋物線形(xing)(xing)(xing)(xing)(xing)(xing)和(he)喇叭形(xing)(xing)(xing)(xing)(xing)(xing)等(deng)；面對稱(cheng)(cheng)(cheng)型(xing)(xing)，常見(jian)的(de)(de)(de)有用于切(qie)(qie)割屬板(ban)材(cai)(cai)的(de)(de)(de)直線形(xing)(xing)(xing)(xing)(xing)(xing)和(he)用于切(qie)(qie)割管材(cai)(cai)的(de)(de)(de)環形(xing)(xing)(xing)(xing)(xing)(xing)聚能(neng)罩兩種(zhong)；中(zhong)(zhong)心對稱(cheng)(cheng)(cheng)型(xing)(xing)，這種(zhong)球(qiu)形(xing)(xing)(xing)(xing)(xing)(xing)聚能(neng)包，中(zhong)(zhong)心有球(qiu)形(xing)(xing)(xing)(xing)(xing)(xing)空(kong)腔和(he)球(qiu)形(xing)(xing)(xing)(xing)(xing)(xing)罩，球(qiu)形(xing)(xing)(xing)(xing)(xing)(xing)罩外敷設炸，若能(neng)在(zai)瞬(shun)間(jian)同時起爆，可在(zai)空(kong)腔中(zhong)(zhong)心點獲得極大(da)的(de)(de)(de)能(neng)量(liang)集(ji)中(zhong)(zhong)。在(zai)工程中(zhong)(zhong)常用的(de)(de)(de)是(shi)軸對稱(cheng)(cheng)(cheng)型(xing)(xing)和(he)面對稱(cheng)(cheng)(cheng)型(xing)(xing)兩類型(xing)(xing)罩。