5, recycling carbide (tungsten steel) and waste recovery of tungsten steel, tungsten steel debris material (to fabric, desktop materials, drain materials, metal materials, etc.) and all kinds of tungsten, cobalt, tin, molybdenum scrap .
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Most of these materials drain off farm fields and into nearby bodies of water.
其中大部分物体都从田地里排出流入附近的水中。
A blockage in the lavatory or the galley drain is possible if unwanted materials get in the system.
如果外来物进入厕所或厨房的排放系统则会引起堵塞。
This research probes into the feasibility of compost and reuse as construction materials of drain sludge.
对利用城市排水管污泥进行堆肥和做建材进行了探讨。
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