A bolt on a lock that is moved by turning the key or knob without activation of a spring.

一种锁闩，在没有弹簧的作用下，靠转动钥匙或把手使它移动。

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Shihu Interchange in Southwest Section of Highway around Suzhou City is a key knob of Suzhou planning express-road network.

苏州绕城公路西南段石湖互通式立交是苏州市规划快速路网的重要交通枢纽。

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