焊制管件采用管材焊制方式加工而成，使用安全可靠。
Fabricated fittings are welded out of a length of pipe, safe and reliable.
本龙门焊机是为焊制几十米长的大型箱式结构件而研制的弧焊设备。
This gantry type welding machine is an arc welding equipment developed for welding large box type construction of tens meters long.
法兰允许用钢板拼接焊制，对长颈法兰应符合GB 150的有关规定。
Blend steel welding of flanges is allowed. Long neck flange should conform to related stipulations of GB 150.
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