The hand-cranked upgrade table is to rotate the gear through the hand rocker, and then drive the lifting spindle to rise and fall to achieve the purpose of adjusting the height of the desk and chair
advantage:
1. Low price, high cost performance
2. No need to power on, no refueling, good safety
3. Gear work, not easy to cause problems, long service life, low noise
Disadvantages:
1. Slow lifting speed
2. The load is not as good as electric
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