There is a hole for mounting bearing temperature sensors on commutator bearing cover and another hole on driving end bearing cover.
同时，换向器端传动端轴承盖上留有轴承温度传感器安装孔。
A cover bearing and integral seat bearing guide the stem assembly for precise alignment with the seat.
阀盖轴承和整体阀座轴承引导阀杆总成，实现与阀座的精确定位。
The front cover exactly matches this shape and also has a raised circular area that fits into a matching countersunk area of the block in front of the main bearing.
封面完全匹配这个形状和也提出了圆形区域，可以成为一个匹配埋头面积块前面的主轴承。
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