... sprocket holes 中导孔，输送孔，定位孔 sprocket pitch 链轮齿距 spurious free dynamic range (SFDR) 无寄生动态范围；纯动态范围 ...
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drive sprocket pitch [车辆] 驱动轮节距
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The formulas concern two kind of saw chains with same pitch and different pitch and three kind of sprockets, which are rim sprocket, spur sprocket and nose sprocket.
这套公式涉及了等节距锯链和不等节距锯链两种情况，还涉及星形驱动链轮、轮辋式驱动链轮和星形导向链轮三种链轮。
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