The rudder device keyway to hole keyway , Hole of the conical hole, Not run through the holes, Moreover structure of two key connection , Large size , High precision machining.
舵装置的键槽是内孔键槽，孔为锥孔、盲孔，而且采用双键联接结构，尺寸大，加工精度较高。
The lubrication system design inside Spiral Conical Dispenser including: the total theory, the key and the design for Dispensing Ring, the strength checkout of the hollow axle and etc;
出灰机内注油系统设计：总体原理、分配环设计与关键、空心滚轮轴强度校核等；
Problem is the most value conical section the key and difficult point for high school maths problem, is generally and other content combine comprehensive problem.
圆锥曲线最值问题是高中数学中的重点和难点问题，一般是和其他内容联合起来的综合题。
Connecting bolts are arranged in the plugging conical points, and an anti-rotation key and an outer six-square sleeve which can realize the linkage are arranged on the screw bolt.
封堵内置有连接螺栓，螺栓上设有防转键及实现连动的外六方套。
Connecting bolts are arranged in the plugging conical points, and an anti-rotation key and an outer six-square sleeve which can realize the linkage are arranged on the screw bolt.
封堵内置有连接螺栓，螺栓上设有防转键及实现连动的外六方套。
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