expansion force

• 伸张力,膨胀力

expansion force的用法和样例：

例句

1. The ratio of the load to the amount of force applied to the handle can be made quite high by using a gear or screw to regulate the upward extension.
   用齿轮或螺纹件调节向上的伸张力，可使负载的重量与施于把手的力量之比达到很高的程度。