填写下面的订货单即可。Simply complete the coupon below.离线订货请拨打这个号码。For offline orders, call this number.我们来年的订货簿已经记满了。We have a full order book for the coming year....
介绍了平齿根齿侧配合英制渐开线花键计算、测量的基本公式及方法.This paper introduces calculation and measurement of BRITISH Standard Involute splines.拖到绘图页上. 拖动黄色菱形可调整中心圆 、 齿根圆和外径的大小.Drag onto the page. Drag yellow diamonds to resize hub circle, root c...
Carpel The female reproductive organ of a flowering plant.心皮:有花植物的雌性生殖器官.Plicate carpel 6 ~8, initiated in a whorl simultaneously.心皮6~8枚, 呈一轮同时发生,为对折型心皮.The browning of Yali pear appear carpel at first , and then appear ...