... 点火杆扇形齿轮 spark quadrant 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 扇形齿轮轴 sector shaft ...
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