给大钳装上与钻杆接头或钻铤相匹配的钳头，再装上安全锁簧。
Fit the rig tongs with the correct jaws for the drill pipe tool joint or the drill collar. Re-install the safety lock springs.
他是那个时代最具创造力的制表大师之一，他拥有锁簧式擒纵机构、双金属摆轮以及螺旋游丝的专利。
He was one of the most inventive watchmakers of his day and held patents for a detent escapement, bimetallic balance and helical balance spring.
他是那个时代最具创造力的制表大师之一，他拥有锁簧式擒纵机构、双金属摆轮以及螺旋游丝的专利。
He was one of the most inventive watchmakers of his day and held patents for a detent escapement, bimetallic balance and helical balance spring.
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