हीरे की खेती की औद्योगिक श्रृंखला
वास्तव में, whether natural diamonds or cultivated diamonds, their industrial chain is not complicated. सामान्य शर्तों में, the upstream is responsible for mining or producing rough diamonds, the middle is responsible for cutting and polishing, and the downstream is responsible for manufacturing and selling jewelry. Natural diamond mining rights are controlled, with the top five …