The new unit is mainly made up of adjusting base, leading screw, diagonal rack and special spanner.
该装置主要由调整座、丝杠、斜齿条和专用扳手组成。
With special spanner according to instruction and requirement to roll operational key 90 degree, so that can achieve to open and close.
用专用扳手按指示要求转动操作键90度即可实现开关。
Convenience : The water chestnut of the screw can fit exactly into this special desighed spanner, which avoids the problem of slipping out as using the normal jack handles.
简便：可以避免一般千斤顶在负载时必需双手操作或摇杆容易脱钩的缺点，配套的扳手与菱角螺杆起着互相固定的作用。
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