spring guard
... spring grinding machine ==> 弹簧磨床 spring guard ==> 弹簧护板 spring guide ==> 弹簧导承,弹簧导杆 ...
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开发的新型管道封堵器由中心管、气囊、活塞、弹簧、夹板、护板、内接头、外接头、连接板和楔键等组成。
A newly developed pipeline plug is composed of a central pipe, balloon, piston, spring, clamp, backplate, inside and outside joints, connecting plate and a wedge key.
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