Anode surface treatment without secondary pollution.
阳极表面处理，不造成二次污染。
Sulphate pollution due to coal cools the planet by shading its surface from sunshine.
由于煤带来的硫酸盐污染通过遮蔽阳光照射到地球表面使地球变冷。
The water pollution surface is wide;
水体污染面广；
If the track surface skid pollution starts, oil should be clear;
若轨道面有油污造成启动时打滑，应清楚油污；
If the track surface skid pollution starts, oil should be clear;
若轨道面有油污造成启动时打滑，应清楚油污；
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