down direction valve的意思|示意
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下行阀
down direction valve的网络常见释义
下行控制阀 down arrow 下行箭头 down direction valve 下行控制阀 down final limit and terminal stopping switch 最低限位及最低楼层停机掣 ..
down direction valve相关例句
Pay attention to the direction of medium in valve body. Add seal cushion between two flanges connection and screw down bolt.
安装时请注意阀体上标注介质流向，两法兰连接时必需加密封垫片，然后均匀锁紧螺栓。