half: n.(pl. halves )1.半,一半;一部分。2.半小时;半英里;半品脱;半价票;〔美国〕半美元;半学年,一学期。3.(球赛的)半场,半局,半盘,半回合。4.(足球)中卫(= halfback); (运动中的)配手,合作者。5.(高尔夫球赛等)相同得分。6.(尤指打官司的)一方。短语和例子half past four = 〔美国〕 half after four 四点
Internal combustion engines - piston rings - half keystone rings made of steel 内燃机.活塞环.钢制半梯形环
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Internal combustion engines - piston rings - half keystone rings made of cast iron 内燃机.活塞环.铸铁制半梯形环
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Internal combustion engines - small diameter piston rings - part 10 : half keystone rings 内燃机.小直径活塞环.第10部分:半楔形环
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Half keystone ring 半梯形环
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Piston rings up to 200 mm diameter for reciprocating internal combustion engines : specification for half keystone rings 往复式内燃机用的直径为200mm及其以下的活塞环:半梯形活塞环规范