rocker arm
柯林斯词典
1. N a lever that rocks about a pivot, esp a lever in an internal-combustion engine that transmits the motion of a pushrod or cam to a valve 摇臂平衡杆
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1. N a lever that rocks about a pivot, esp a lever in an internal-combustion engine that transmits the motion of a pushrod or cam to a valve 摇臂平衡杆