暗杆-内螺纹结构用于青铜和铸铁闸阀。
Non-rising-inside screw stems are used in bronze and iron gate valves.
按阀杆的螺纹位置划分，可分为明杆闸阀和暗杆闸阀两种。
Position by the valve stem threads are divided into clear and dark bar bar gate valve two...
型号1710平衡阀为暗杆结构，配置抛物线（塞）形阀瓣。
The Fig. 1710 Balancing valve is a non-rising stem design incorporating a parabolic (plug) shaped disc.
加长件包括手轮，暗杆，连接件和加长件，允许在上方进行远程操作。
The extension includes handwheel, non-rising stem, fittings and extensions to allow remote operation normally from above.
采用倒关双密封设计，可带压更换上密封组件，整体阀盖暗杆设计，结构紧凑。
Use back seal design, can replace top seal parts under pressure. Entirety of non-rising bonnet design, have compact structure.
用于手轮执行器阀门上的地轴承架可以在上方对阀门进行操作，包括手轮，暗杆，连接件，加长件，以及带闸板位置指示器的地轴承架。
A floorstand for handwheel actuated valves allows operation from above. Included is handwheel, non-rising stem, fittings, extension, and floorstand with gate position indicator.
用于手轮执行器阀门上的地轴承架可以在上方对阀门进行操作，包括手轮，暗杆，连接件，加长件，以及带闸板位置指示器的地轴承架。
A floorstand for handwheel actuated valves allows operation from above. Included is handwheel, non-rising stem, fittings, extension, and floorstand with gate position indicator.
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