Balance weight set free fall emergency braking device, which can realize auto control load loss protection, when the wellhead end accidental loss of load, balance weight free fall.

平衡重设置自由落体紧急制动装置，可实现井口端意外失载后平衡重自由落体坠落不能人控，却能自控失载保护的万无一失。

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Magnetic braking systems are harder to explain than centrifugal systems as they rely on a spool made of aluminum (a non-magnetic metal) reacting to a set of magnets.

磁力刹车系统比离心刹车系统更难解释，因为他们仅靠一个铝盘(非磁性材料)和一套磁片来相互作用。

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The usage and hidden trouble of hand brake of locomotive if introduced, an automatic protective set is added to limit locomotive moving on braking state.

介绍了机车手制动机的作用及机车运行时手制动机处于制动状态的危害。

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Williams are testing a flywheel kinetic energy recovery system - the device that stores energy under braking - and have set up a company to develop the technology both for Formula One and further applications outside the sport.

BBC: Williams opt against new system