具体可以先用干净的湿海绵拭擦滑轨、沟槽上的灰尘，再用干海绵擦拭多一次，以保持密封圈的清洁。
The concrete can be used to dust, damp sponge rails and grooves on clean with a dry sponge, once more, to keep clean seal.
具体可以先用干净的湿海绵拭擦滑轨、沟槽上的灰尘，再用干海绵擦拭多一次，以保持密封圈的清洁。
The concrete can be used to dust, damp sponge rails and grooves on clean with a dry sponge, once more, to keep clean seal.
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