full keystone ring 全楔形环
halfgauge keystone ring 半楔形环
keystone-type piston ring [机] 梯形活塞环
keystone piston ring groove gauge 扭转环环槽量规
keystone design ring groove 扭转环环槽
Half Keystone Barrel Faced Ring 楔形桶面环
Keystone And Taper Faced Ring 梯形锥面环
Keystone And Barrel Faced Ring 桶面梯形环
·2,447,543篇论文数据，部分数据来源于NoteExpress
New type piston ring synthetic measurement instrument is the instrument which can measure both the height and trapezoid Angle of the keystone piston ring and wedgy piston ring.
新型活塞环综合检测仪就是一种能同时测量梯形或楔形活塞环的环高与梯形角的综合测量仪。
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