She looked at the wear rings to lovers put the hands of that woman, and then look at their sweet to kiss, and butterfly shed tears of sorrow.
她看着爱人把戒子戴到那个女人手上，然后看着他们甜蜜地亲吻着，蝴蝶流下了伤心的眼泪。
Bit gauges, rings of defined circumference, are slipped around drill bits to detect and measure wear, which reduces the circumference of the bit during drilling.
钻头规是种周长一定的环型物，它卡紧在钻头的周围，去检测和测量钻头是否磨损，即在钻井过程中是否减少了周长。
The design of integral non-backpressure piston rings was studied in order to reduce wear and to raise the piston ring life.
为了减少磨损，提高活塞环的使用寿命，对整体无背压活塞环的设计进行了研究。
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