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。
2
Metal loop (usually aluminum) with a spring-loaded gate on one side used for connecting various parts of a climbing system.
一侧有弹簧门的金属环状物(通常为铝)，用于连接攀登系统的各部分。
3
The transition pedal mechanism comprises a transition pedal, a gas spring, a cross rod, a connecting rod, and an upper and a lower sleeves of a movable rod.