支撐水(shui)下切(qie)(qie)割(ge)(ge)(ge)法(fa)是指(zhi)在引(yin)弧形成起(qi)始切(qie)(qie)口后，割(ge)(ge)(ge)條(tiao)傾斜并與切(qie)(qie)割(ge)(ge)(ge)面保持(chi)80°～85°角，打撈隊(dui)利用割(ge)(ge)(ge)條(tiao)藥皮套筒(tong)支撐在工件表(biao)面上(shang)，割(ge)(ge)(ge)條(tiao)移(yi)動過程中，始終不離開工件的(de)電弧-氧切(qie)(qie)割(ge)(ge)(ge)方法(fa)。該方法(fa)既(ji)可自(zi)左向右(you)，也(ye)可自(zi)右(you)向左，還(huan)可靠在規尺上(shang)進行水(shui)下切(qie)(qie)割(ge)(ge)(ge)，操作方便，效率較高，適用于中、薄板的(de)水(shui)下切(qie)(qie)割(ge)(ge)(ge)工程。

維(wei)弧水下(xia)切(qie)割(ge)(ge)法是指起始切(qie)口形成后(hou)將割(ge)(ge)條提起，離開工(gong)件表面約2～3mm，并(bing)與工(gong)件保持(chi)(chi)(chi)垂直，然后(hou)沿切(qie)割(ge)(ge)線均勻地向前移動(dong)，始終維(wei)持(chi)(chi)(chi)電弧不(bu)(bu)熄滅。該方法適(shi)用(yong)于厚度在5mm以(yi)下(xia)薄鋼板的(de)水下(xia)切(qie)割(ge)(ge)。由于打撈隊(dui)在水下(xia)工(gong)程保持(chi)(chi)(chi)身體(ti)的(de)穩定性較困難，故電弧不(bu)(bu)易保持(chi)(chi)(chi)穩定。另外，切(qie)割(ge)(ge)質量也略低(di)于支撐切(qie)割(ge)(ge)法，因此(ci)實際應用(yong)中不(bu)(bu)大采用(yong)維(wei)弧切(qie)割(ge)(ge)法。

加深水下切(qie)割(ge)法是指(zhi)在起始切(qie)口形(xing)成后的(de)切(qie)割(ge)過(guo)程中，割(ge)條不斷(duan)伸(shen)入割(ge)縫中，使割(ge)縫不斷(duan)加深，直到割(ge)穿工(gong)(gong)件(jian)(jian)，如此往復進行(xing)，將工(gong)(gong)件(jian)(jian)割(ge)開。該方(fang)法適用于(yu)采用支撐切(qie)割(ge)法一次(ci)不易割(ge)透的(de)厚板(ban)或(huo)層板(ban)，打撈隊操作(zuo)時割(ge)條上下移動(dong)要協調均勻，以保持電弧穩定燃燒。

盛龍水下堵(du)漏封堵(du)的誠施工(gong)單位，管(guan)道內(nei)部空(kong)間(jian)小，空(kong)氣流動較慢，可能(neng)存在大(da)量易(yi)燃(ran)，易(yi)和有(you)(you)毒有(you)(you)害的氣體，對污水管(guan)道進(jin)行封堵(du)過程中一(yi)定要注意操作(zuo)，尤(you)其是需要人工(gong)進(jin)入管(guan)道時，尤(you)其需要遵守規則，打撈隊潛水員施工(gong)規定:排污管(guan)道清(qing)理(li)清(qing)淤屬(shu)于有(you)(you)限空(kong)間(jian)作(zuo)業。

 以實現、和(he)便捷的(de)(de)水(shui)下(xia)作業。電(dian)(dian)(dian)焊(han)(han)(han)機的(de)(de)主(zhu)要(yao)(yao)類型根據輸出電(dian)(dian)(dian)流(liu)的(de)(de)類型，電(dian)(dian)(dian)焊(han)(han)(han)機電(dian)(dian)(dian)源可分為(wei)：直(zhi)流(liu)焊(han)(han)(han)接(jie)電(dian)(dian)(dian)源和(he)交流(liu)焊(han)(han)(han)接(jie)電(dian)(dian)(dian)源。交流(liu)電(dian)(dian)(dian)焊(han)(han)(han)機主(zhu)要(yao)(yao)使用弧(hu)(hu)焊(han)(han)(han)變(bian)壓(ya)器(qi)(qi)；直(zhi)流(liu)電(dian)(dian)(dian)焊(han)(han)(han)機一般又可分為(wei)弧(hu)(hu)焊(han)(han)(han)發電(dian)(dian)(dian)機、弧(hu)(hu)焊(han)(han)(han)整流(liu)器(qi)(qi)和(he)弧(hu)(hu)焊(han)(han)(han)逆變(bian)器(qi)(qi)。絡的(de)(de)交流(liu)電(dian)(dian)(dian)變(bian)成適用于弧(hu)(hu)焊(han)(han)(han)的(de)(de)低(di)壓(ya)交流(liu)電(dian)(dian)(dian)的(de)(de)一種電(dian)(dian)(dian)焊(han)(han)(han)機，主(zhu)要(yao)(yao)由主(zhu)變(bian)壓(ya)器(qi)(qi)及所需的(de)(de)調節部分和(he)指示裝置等組(zu)成。弧(hu)(hu)焊(han)(han)(han)變(bian)壓(ya)器(qi)(qi)的(de)(de)主(zhu)要(yao)(yao)特點是：結構(gou)簡單、易于維修、成本低(di)廉、效率高但電(dian)(dian)(dian)弧(hu)(hu)穩(wen)定性(xing)差等。由于水(shui)下(xia)作業所需要(yao)(yao)的(de)(de)電(dian)(dian)(dian)焊(han)(han)(han)機必須為(wei)直(zhi)流(liu)電(dian)(dian)(dian)源，所以弧(hu)(hu)焊(han)(han)(han)變(bian)壓(ya)器(qi)(qi)不能在水(shui)下(xia)電(dian)(dian)(dian)－氧(yang)切(qie)割和(he)水(shui)下(xia)濕法(fa)焊(han)(han)(han)接(jie)作業中使用。