养蚕、缫丝是我国古代的伟大发明。
Sericulture and filature are two great ancient inventions of our country.
缫丝厂现行小烘丝装置热效率低，热量损耗大。
The current reel silk drying device results in low heat efficiency but high heat loss.
缫丝厂现行小烘丝装置热效率低，热量损耗大。
The current reel silk drying device results in low heat efficiency but high heat loss.
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