back seating stem 是什么意思？

伊凡

·阀杆设计

采用整体锻造工艺制成，按照标准要求确定最小直径。

1 O7 F8 `' `+ a; j2 c7 n3 lStem Design
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% {$ U, \3 x" @9 a! c- hThe stem is of integral forged design,The minimum diameter of the stem shall per the standard requirement.