不要用塑料布等不透水材料覆盖割草机。
Do not cover the mower with impermeable materials - such as plastic sheets.
建筑里所有的表面都应当用不透水的材料这样可以彻底清洗。
All surfaces inside the building should be of impervious material to permit thorough washing.
水可能会在不透水的材料上冷凝并造成割草机的金属部件锈蚀。
Water may condense under impermeable materials and cause corrosion of metal parts of the mower.
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