... 天窗 scuttle; trap-door; skylight ... 扇形齿轮 gear sector; gear segment; s ... 扇形齿轮 cam gear quadrant; elevating arc; gear sector; geared sector; notched segment; quadrant gear; rack circle; scalloped wheel; sector gear; sector wheel; segment gear; tooth sector; toothed quadrant; toothed sector; toothed segment ...
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gear segment tooth 扇形齿轮轮齿
segment gear 扇形齿轮
Micro segment Gear 微线段齿轮
segment gear luffing 扇形齿轮变幅
steering segment gear 转向扇形齿轮
a segment gear 扇形齿轮
micro line segment gear 微线段齿轮
micro-line-segment gear 微线段齿轮
micro-segment gear drive 微线段齿轮
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