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实验室及工业性试验表明,立井罐道采用自润滑材料和固体润滑剂式镶条较原来的普通铸铁镶条诸多优点,并能提高经济效益。
Laboratory and industrial tests show that vertical shaft canals with self-lubricating materials and solid lubricant-type inserts compared to the original ordinary cast iron inlay a lot of advantages and can improve economic efficiency.