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- [7] STATE OF THE PM INDUSTRY IN NORTH AMERICA-2021 INTERNATIONAL JOURNAL OF POWDER METALLURGY, 2021, 57 (03): : 31 - 34
- [8] JPMA 2016 annual report: Japan's PM production stabilized after decline; China PM recovers Metal Powder Report, 2017, 72 (04): : 244 - 246
- [10] The industry is recovering slowly, but steadily WOCHENBLATT FUR PAPIERFABRIKATION, 2011, 139 (10): : 776 - 776