The mechanism is comprised of steel sleeve, water nozzle, spring, positioning pin and piston.
装置由钢套、水嘴、弹簧、定位销和活塞等组成。
The positioning apparatus also includes a piston arranged within said outer cylinder such that the piston and the outer cylinder define a fluid compartment within the outer cylinder.
所述定位装置还包括布置在所述外气缸中的活塞，所述活塞和所述外气缸限定出位于所述外气缸中的流体腔。
The positioning apparatus also includes a lifting device for raising and lowering the outer cylinder. The lifting device includes a threaded drive mechanism coupled to the piston.
所述定位装置还包括用于升高和降低所述外气缸的提升装置，所述提升装置包括与所述活塞相连的带螺纹驱动机构。
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