在向上滑动显示屏以露出拇指键盘时，没有发出弹簧助力的喀嚓声；拉动的动作就像是在犁地。
When you slide the screen up to reveal the thumb keyboard, there's no spring-assisted snap; it drags like a plow through soil.
四连杆铰链气弹簧助力式开启机构是目前高档汽车特别是轿车上经常采用的一种结构。
Air spring booster type four bar linkage opening mechanism is a currently used common structure on high class automobile, especially on car.
膜片弹簧离合器，液压远距离操作，带气压伺服助力器。
Described the clutch diaphragm spring clutch, hydraulic remote operation, pneumatic servo booster.
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