单词：offset piston
offset piston的用法和样例：
例句
- The push rod was screwed into a miniature piston head.这根推杆拧紧在一个微型的活塞头上。
- When the exhaust stroke starts, the cylinder is swept out by the upmoving piston.当排气冲程开始时，气缸被向上运动着的活塞刮掠。
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