1. 制轮楔：linatron 利纳特朗波导加速器 | linchpin 制轮楔 | linchpin 车辖

2. 车轴销：车轴投影面积vehiclearea | 车轴销linchpin | 车轴小齿轮axlepinion

3. 车轴销;制轮楔;关键;枢纽：linage-counter 行计数器 | linchpin 车轴销;制轮楔;关键;枢纽 | lincoln weld 焊剂层下自动焊

1. 关键；关键性人物（或事物）
If you refer to a person or thing as the linchpin of something, you mean that they are the most important person or thing involved in it.

e.g. He's the lynchpin of our team and crucial to my long-term plans.
他是我们队伍的核心，对实现我的长远规划举足轻重。

noun

1. pin inserted through an axletree to hold a wheel on

Synonym: lynchpin

2. a central cohesive source of support and stability

e.g. faith is his anchor
the keystone of campaign reform was the ban on soft money
he is the linchpin of this firm

Synonym: anchormainstaykeystonebackbonelynchpin