manual gate valve 手动闸阀

manual gate-adjustment screw 手动闸门调节螺旋

manual flow gate 手动流量阀门

Manual Slide Gate 手动闸板阀门

manual flow gate control handle 手动流量阀门控制手柄

Manual Spiral Gate 手动螺旋闸门

manual operated gate 手动闸门

MANUAL BOTH GATE BOP 双闸板手动防喷器

MANUAL SINGLE GATE BOP GROUP 手动单闸板防喷器组