quadrant
特殊用法azimuth quadrant1.■地平象限仪brake lever quadrant1.■制动杆扇形板bubble quadrant1.■带汽泡水准的扇形测角仪counter quadrants1.■对部counter-lateral quadrants1.■对侧部deck sash quadrant1.■顶棚窗扇形板elevator quadrant1.■升降机扇形齿轮gear quadrant1.■扇形齿轮(板), 转向齿轮, 月牙轮gunner's quadrant1.■火炮象限仪lower quadrant1.■下象限rudder quadrant1.■方向舵扇形体stream quadrant1.■测流象限throttle lever quadrant1.■节流杆扇形板upper quadrant1.■上象限
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