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First, the pump base to firmly and to shorten the length of the water.
首先，水泵底座要牢固，并尽量缩短吸水管的长度。
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The connecting rod of the power base has fixed length.
动力底座的连杆做成定长。
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The connecting rod of the power base has fixed length.
动力底座的连杆做成定长。
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