... cocoon for egg production 种茧 cocoon grade 茧级 cocoon length 茧长 ...
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Current cocoon can only reel male and female composite silk which is difficult to mass-produced high-grade silk because male and female are mixed when drying cocoon, boiling cocoon and reeling cocoon.
现行蚕茧在烘茧、煮茧、缫丝时都是雌雄茧混合，只能缫制雌雄复合丝，很难批量生产出高品位生丝。
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