It shall be of robust and rigid construction.
隔火帐之构造必须坚固。
This standard applies to rigid structure, average project construction to use seamless steel tube.
本标准适用于机械结构、一般工程结构用无缝钢管。
This standard applies to rigid structure, average project construction to use seamless steel tube.
本标准适用于机械结构、一般工程结构用无缝钢管。
应用推荐