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PSFRH18 20 22 25 30-L-F-P-T-4 5 6 8 10 12 16 20-SC替代MSM
PSFRH6 8 10 12 13 15 16 17-L-F-P-T-2.6 3 4 5 6 8 10 12-SC
SFRH PSFRH SSFRH-6 8 10 12 13 15 16 17 18 20 转轴
SFRH/PSFRH/SSFRH6/8/10/12/13/15/16/17/18/20/22/25/30/35/40/5
