某污水处理厂的潜水搅拌器叶轮磨损严重，且叶轮备件需从国外进口。
The impeller of submersible mixer in some wastewater treatment plant, whose parts are imported from other countries, is heavily abased.
某污水处理厂的潜水搅拌器叶轮磨损严重，且叶轮备件需从国外进口。
The impeller of submersible mixer in some wastewater treatment plant, whose parts are imported from other countries, is heavily abased.
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