protective screw什么意思

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protective screw什么意思
protective screw什么意思

protective screw什么意思
protective screw 意思可能是防护钉.
protective [prəu'tektiv]
adj.防护的；关切保护的；保护贸易的
screw [skru:]
vt.旋,拧；压榨；强迫
n.螺丝钉；吝啬鬼；螺旋
vi.转动,拧

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