back of ring是什么意思

用法例句

Microstructure and Mechanical Properties of BH22 Piston Alloy in Squeezing Casting;

挤压铸造BH122活塞合金的显微组织与力学性能

Research On Machining Principle For Non-Cylinder Piston Pin Hole Based on GMM;

基于GMM的活塞异形销孔加工原理研究

Research on On-site Measurement of Middle-bulged Varying Ellipse Profile of Piston Skirt;

活塞裙部中凸变椭圆型面在位检测的研究

Squeeze casting has been used for the shaping of comparatively large sized pistons made of hypereutectic aluminum-silicon alloys(silicon content between 16% to 20%).

采用挤压铸造的方法，作为尺寸较大的过共晶铝硅合金（含硅１６％～２０％）活塞的成型工艺。

The authors study the wear curve of cutting tools and the surface roughness of motorcycle pistons on hypereutectic Al-22%Si alloy,and discuss the influence of several machining factors on the machinability of hypereutectic Al -22%Si alloy, such as the materials of tools, the geometric shapes of cutting blade and the machining parameter.

探讨了高硅铝AL—22%Si合金摩托车活塞切削加工时刀具的磨损规律和工件表面粗糙度的影响;讨论了刀具材料、切削刃几何参数和切削用量对该材料切削的影响规律。

Compared with the conventional materials(ZL108,ZL109), SiCp/ZL108 composite has better physical and mechanical properties and is an ideal material for motorcycle pistons.

研究采用铸造旋涡法制造ＳｉＣｐ／ＺＬ１０８复合材料的工艺，重点探讨铝液温度、颗粒表面处理及合金元素（Ｍｇ、Ｂ、Ｔｉ）对颗粒的回收率和分布的影响；与传统的活塞材料（ＺＬ１０８，ＺＬ１０９）相比，该材料具有优良的机械性能和物理性能，是摩托车活塞的理想材料。

The surfaces of piston and rings of SANTAN JV gasoline engine were tribologically modified by means of rare earth self-lubrication, and the clearances of the piston skirt to cylinder and ring gaps were modified to -5~2 μm and 150 μm, respectively.

采用稀土自润滑表面处理技术对桑塔纳 JV汽油发动机活塞与活塞环表面进行处理 ,并对原机进行活塞与汽缸、活塞环端口的超小间隙改造 (配缸间隙 - 5～ 2μm,活塞环开口 15 0μm ) ,通过台架试验对超小间隙发动机抗拉缸性能和摩擦功耗进行了考察 ;通过原子力显微镜对活塞表面的微观形貌和摩擦力进行了测试 。