求翻译：升降螺杆的保养：升降螺杆约每个月保养一次。保养时先拆下后挡板，然后将黄油涂抹于链条、链轮与四条T型螺杆的接触间隙内，然后开启升降装置上下调整，使各部分充分润滑。保养后再装回挡板即可。是什么意思？

The lifting screw Maintenance: lifting screw about maintenance once a month. Maintenance Remove the tailgate, then smear the butter on the chain sprocket with four t screw contact gap, and then turn on the lifting device up and down to adjust, so that sufficient lubrication of the various parts. Mai

The lifting screw maintenance: Lift screw about each month. When maintenance is to first remove the butter paddle, and then apply the chains, sprockets and article 4 of the screw type T contact gap, and then lift up and down on the part of adequate lubrication. After the service to replace the bezel

Rises and falls the screw rod the maintenance: Rises and falls screw rod each month to maintain one time approximately.When maintenance dismantles the back end plate first, then spreads the butter wipes in the chain link, the chain wheel and in four T screw rod contact gap, then about the opening el

Maintenance of the lifting screw: adjustable screw about maintenance once a month. Maintenance remove the backplate and butter onto the chain and sprockets with contact gap of four t-screw and turning the adjustment up and down lifting devices, to lubricate the parts. Maintenance, then replace the b

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