主体材质采用不锈钢，底座有三个螺钉固定，带装饰盖。
The principal part is made of steel, with three screws fixed at bottom and decorative cover.
缸筒与前、后端盖，用固定螺钉和橡胶密封圈固定且密封。
The cylinder and the front and rear end caps are fixed and sealed by fixed screws and rubber packing rings.
前、后端盖利用螺钉及止口固定，同时将转子总成固定。
The front end cover and the rear end cover are fixed by screws and rabbets. Meanwhile, the rotor assembly is fixed.
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