Frame: the frame is made into a space frame structure, including the welded longitudinal beam and the whole pulling-through crossbeam, of which are made of 16mn vehicle steel.

车架：车架采用16 Mn车用钢板制成的焊接式纵梁和整体贯穿式横梁组焊而成的空间框架结构。

youdao

The frame number marks, made of steel plate shall be welded and painted on the hatch coaming and bulwark at the place of every 10 frame-space and at every bulkhead.

每隔10档肋位和每一舱壁处要用钢板割的肋位标记焊接到舱口围和舷墙上。

youdao