noun 下载 🔗分享 主销, 中心销 The main bolt of a structure, especially the bolt in a motor vehicle that links the chassis to the axle, providing the steering pivot. Examples : "The mechanic checked the kingbolt on the old truck to make sure the front wheels could still turn safely. " 这位机械师检查了老卡车上的主销,以确保前轮仍然能安全转动。 vehicle machine part technical structure 与AI对话词汇游戏阅读练习