When the ground on the piano, forward backward, met the ground level is not usual, don't too hard and avoid the piano body tilt, jean wheel broken or damaged.
在平地推钢琴时，前进后退，遇到地面高低不平时，不要用力过猛，避免对琴体倾斜，琴轮折断或部件损坏。
When the ground on the piano, forward backward, met the ground level is not usual, don't too hard and avoid the piano body tilt, jean wheel broken or damaged.
在平地推钢琴时，前进后退，遇到地面高低不平时，不要用力过猛，避免对琴体倾斜，琴轮折断或部件损坏。
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