明杆平行式双闸滑阀
rising-stem double-disk parallel slide valve
暗杆楔式闸阀
non-rising stem wedge gate valve
non-rising stem wedge sluice valve
井口暗杆闸阀
non-rising stem gate valve for wellhead
电动楔式闸阀
electric actuated wedge gate valves
平行式闸阀
parallel slide gate valve
组合式闸阀研磨机
combined sluice valve grinder
半透明式分光镜
semitransparent mirror splitter
会计格式明细报表
detail report in accounting format