1.
In simplest terms, piston rings are thin, circular pieces of metal that fit into grooves in the tops of the pistons.
简单地讲，活塞环就是装在活塞顶部的凹槽里的薄，圆的金属。
2.
STUDY OF COMPOSITE PISTON TOP CONSTRUCTION AND CLEARANCE OF EACH CONTACT FACE
组合活塞顶部结构及各接触面间隙的研究
3.
It is thick at the top where it takes the brunt of the heat and the expansion force.
活塞顶部厚，承受着高温燃气的带有冲击性的高压力。
4.
The top part of the piston is the head, or crown.
活塞的顶部是活塞头或者活塞顶。
5.
Most pistons have three ring grooves at the top.
大多数活塞的顶部有3个活塞环槽。
6.
Analysis and Improvement of the Habitude Damage in the Alumininm Skirt of the Composite Piston
钢顶铝裙活塞裙部破损惯性质量问题分析及改进
7.
Top ring gap must be positioned at 30 degrees to the right of the combustion chamber recess (looking at the piston crown from above).
顶部环间隙必须定位在燃烧室凹口右30度（从上看活塞头）。
8.
A Study of Fuel Film Distribution on the Piston Top of Diesel Engine
柴油机活塞顶面油膜分布规律的研究
9.
The thick part of the piston that holds the piston pin is the pin boss.
用来支撑活塞销的活塞厚的部分称为活塞销凸台。
10.
The piston-rods connect the pistons to the parts of the engine which they move.
活塞杆把活塞和引擎中被活塞驱动的部件连在一起。
11.
The underside forms the combustion chamber with the top of the piston.
气缸盖下面与活塞顶上的空间形成燃烧室。
12.
Open test cock3 and allow water to fill the tube to the top.
开启测试旋塞3号，使得水注到管子的顶部。
13.
Extract into the currently 'active' (On Top) Source Model Document.
提取到当前“活动的”（顶部）源模型文档。
14.
The central wedge-shaped stone of an arch that locks its parts together.
拱顶石，塞缝石拱的中部楔形石头，使拱的各个部分连在一起
15.
The piston is an important part of a four-stroke cycle engine.
活塞是四冲程发动机的重要部件。
16.
Principle and Analysis of Making Ellipse-cone;
一种活塞中凸变椭圆裙部的加工方法
17.
Research on the die-forging of ZY760 rod end of piston
ZY760活塞杆头部模锻成型工艺研究
18.
When the stopcock is opened, water flows from the top of the warmer column into the colder column.
打开活塞后，水即由较热的水柱顶端流入较冷的水柱。