Remove fan blade assembly from viscous fan drive unit (four bolts).

从粘性风扇驱动装置（四个螺栓）上拆卸风扇叶片组合。

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All that is needed is to bolt the unit to its support using four bolts.

所要做的只是将单元用四个螺栓固定到其支承表面上。

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Remove the four bolts that are in front first and loosen the one at the back.

删除四个螺栓在前面第一和放松一个在后面。

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The plaque was affixed to the rover's deck with four bolts.

FORBES: President's Signature On Board Curiosity

Also on view are four of his recent "Extrusion" benches, made without nuts and bolts by squeezing red-hot aluminum out of a machine as one might pinch toothpaste out of a plastic tube.

WSJ: In New York, the Work of Thomas Heatherwick