heavy wall vessels 中文意思是什麼
heavy wall vessels
解釋
厚壁容器-
Where heavy wall vessels with small nozzle diameters are involved, an alternative method of full penetration may be permitted if prior written approval is obtained from secco
對于帶有小直徑接管的厚壁容器,在事先取得賽科公司書面認可后,可採用其它全熔透方法。
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