每个活塞有曲柄连接曲轴臂。

Each piston has a crank arm attached to a crankshaft.

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百分表及通用百分表托架必须通过螺钉固定在气缸体上，位置与曲轴臂相对。

Dial gauge with universal dial gauge bracket must be screwed to the cylinder block and placed against the crank arm.

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为了减少或降低这种震动，需要把平衡重量从曲轴中心线沿着曲轴臂相反方向安置其上。

In order to reduce or eliminate such vibration, it must be provided with counter balanced weights that extend radically from the crankshaft centerline in the opposite direction of the crank arms.

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