noun🔗Share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."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。vehiclemachineparttechnicalstructureChat with AIVocabulary GamePractice Reading
