虽然他们对平面形的感觉能达到相当准确的程度。
Though they may attain considerable accuracy in the perception of flat form.
注油孔为设在电机轴侧 面的凹槽形或平面形注油孔。
The oil injection hole is a concave channel shape or planar oil injection hole which is arranged on the side surface of the motor shaft.
滑动板上的两个火线触点为平面形的，使拧装灯泡时阻力小不易损坏；
Two live wire contacting points on the sliding plate are in flat form, which reduces resistance force when the bulb is screwed, and the bulb is uneasy to be damaged.
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