基本尺寸			型号
			Model
d[mm]	D[mm]	B[mm]
25	37		NA5904
25	37		RNA4904
25	37		NA4904
25	32		LM2525
25	32		RLM2525
25	32		LM2520
25	32		RLM2520
25	32		LM2512
25	32		RLM2512
22	30		RNA6903
22	30		NA6903
22	30		LM223020
22	30		RLM223020
22	30		RNA5903
22	30		NA5903
22	30		RNA4903
22	30		NA4903
22	29		LM2225
22	29		RLM2225
22	29		LM2220
22	29		RLM2220
20	28		RNA6902
20	28		NA6902
20	28		RNA5902
20	28		NA5902
20	28		RNA4902
20	28		NA4902
20	27		LM2025
20	27		RLM2025
20	27		LM2020