Aluminum alloy shaft and plastic head, shaft length could be adjustable.
铝合金杆身，头部为塑料杯。杆身可伸缩。
Installed from underside of pump support plate to top of pump casing, accurately registered to maintain rigid and permanent alignment with any shaft length.
从泵的支撑板下面向泵外壳顶部安装，准确记录以保持与任何轴长永久对准。
Then check the hole two and a half coupling is the same diameter and length of the original motivation, job machine diameter and shaft length of the size of match.
然后检查两个半联轴节的内孔直径和长度是否同原动机、工作机的直径和轴伸长度尺寸相符。
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