Check the lower surface (1) screw: do not miss the lock, do not lock askew, do not slip teeth, and do not use mistakes; (2) omentum: do not deform, do not clip foreign matters, do not scratch / miss the installation; (2) foot pad: do not tilt, do not deform, and do not fall off;<br>Note: gently move the foot pad by hand: the foot pad shall not be raised.<br>
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