我用拇指指甲拧紧了灯上的螺丝。
用膨胀螺丝将上述配件拧紧固定。
Fix and tighten the above-mentioned parts with expansion bolts.
他正在弄一架相机，用一个珠宝商用的小改锥拧紧顶盖的一个螺丝，这句话几乎是对着相机说的。
He was working on a camera, almost talking to it as he tightened a screw on its top with a jeweler's screwdriver.
他发现其中一个螺钉松了，于是用螺丝刀把螺钉拧紧。
He found that one of the screws was loose, so he tightened it with a screwdriver.
松开罗架的底板螺丝，用增垫和去垫的方法调整两罗拉的中心高度，然后再拧紧螺丝。
Loose soleplate screw of the roller shelf, and adjust the central height of the two rollers by increasing or decreasing cushion, then tighten the screw.
松开罗架的底板螺丝，用增垫和去垫的方法调整两罗拉的中心高度，然后再拧紧螺丝。
Loose soleplate screw of the roller shelf, and adjust the central height of the two rollers by increasing or decreasing cushion, then tighten the screw.
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