And then you'll see there's a little tension spring that you press down and that actually creates the beautiful relief pattern that you see on top.
然后你会看到有一个小的张力弹簧，你按下它实际上会产生你在上面看到的美丽的浮雕图案。
Tension spring
原声例句
感恩节食谱
B1M建筑科普
However, if the cable broke — releasing its tension — springs behind the levers would force them outwards into grooves in the elevator rails, those rails were then forced against the shaft walls, quickly arresting any cars fall.
然而，如果缆绳断裂——释放拉力——杠杆后面的弹簧就会迫使杠杆向外进入电梯轨道的凹槽，然后这些轨道就会被压在井壁上，迅速阻止任何坠落的电梯轿厢。
中文百科
弹簧 Spring (device)
（重定向自Tension spring）
弹簧是一种利用弹性来工作的机械零件。一般用弹簧钢制成。利用它的弹性可以控制机件的运动、缓和冲击或震动、储蓄能量、测量力的大小等。广泛用于机器、仪表中。
弹簧的受力与变形符合虎克定律，即受力与形变量需成正比，见下式:
英语百科
Spring (device) 弹簧
（重定向自Tension spring）
A spring is an elastic object used to store mechanical energy. Springs are usually made out of spring steel. There are a large number of spring designs; in everyday usage the term often refers to coil springs.
Small springs can be wound from pre-hardened stock, while larger ones are made from annealed steel and hardened after fabrication. Some non-ferrous metals are also used including phosphor bronze and titanium for parts requiring corrosion resistance and beryllium copper for springs carrying electrical current (because of its low electrical resistance).
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