Preassembly of economizer coils shall be expedited ; 100 nos . joints of eco. & SH shall be welded.
加快省煤器蛇形管排预组合，本周内完成省煤器和过热器接口100个。
2
Directed workers engaged in pipe cutting and preassembly and installation of plumbing systems and components.
指导工人切割水管、先装配、置水管系统，及其零件。
3
This paper presents the customized equipment suitable to screw "adjusting bolt module" in "cover sheet assembly (preassembly)" for automobile assembling process.