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.
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。
The movable device mainly consists of the nut, bolt, lifting wedge, backseat, supporting seat of the clamp plate, spring and pressure plate and so on.
活动装置主要有螺母、螺栓、提升楔块、后座、座板支座、弹簧以及压板等组成。
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