they also shall be constructed so that the indicator cannot be misassembled 1 j3 Z( w1 z# E' I: q; _to give an incorrect indication as to whether the valve is open or closed b* C# @1 N6 u" y- u
从后面incorrect 看出是错装
原帖由 睿智 于 2007-12-8 19:10 发表 1 v8 Z4 }+ P6 i7 b5 c9 Y6 z9 K5 jthey also shall be constructed so that the indicator cannot be misassembled ( T, H4 r- D4 M0 s7 @to give an incorrect indication as to whether the valve is open or closed 2 E1 }( P- o* B' A从后面incorrect 看出是错装