可选硬管、收工工具和阶梯工具。
Optional floor wand, hand tool, and stair tool are available.
这使得每个阀直接安装无需硬管或油管用一个执行机构。
This allows each valve to be mounted directly to an actuator without the use of hard piping or tubing.
在为各种非金属软管与硬管的联接上，提供了可靠的卡具。
The utility model provides a reliable clamping device for connection between various nonmetallic hoses and hard tubes.
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