they also shall be constructed so that the indicator cannot be misassembled 0 U- d" n7 o/ I4 N
to give an incorrect indication as to whether the valve is open or closed! G0 v: s! v. v& i
从后面incorrect 看出是错装
原帖由 睿智 于 2007-12-8 19:10 发表 8 p* R& Z+ a# W. O2 @
they also shall be constructed so that the indicator cannot be misassembled ; G& J( k9 t: {, Y# k1 p
to give an incorrect indication as to whether the valve is open or closed 0 |1 _1 p$ v: u9 }2 _$ W5 A2 g* t Y从后面incorrect 看出是错装