原帖由 睿智 于 2007-12-8 19:10 發(fā)表, H2 c* `8 Q& V( k# ?
they also shall be constructed so that the indicator cannot be misassembled ) t: n5 W% W5 g* }& U' G/ h! D
to give an incorrect indication as to whether the valve is open or closed4 j. h3 d( e0 w6 { X* V
從后面incorrect 看出是錯裝
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