基本尺寸			型號(hào)
			Model
d[mm]	D[mm]	B[mm]
20	52	15	7304 BECBPH
20	47	14	7204 BEP
20	47	14	7204 BECBPH
20	52	15	7304 BEP
20	52	15	7304 BECBM
20	52	15	7304 BECBP
20	52	15	7304 BECBY
20	47	14	7204 BEGBP
20	47	14	7204 BEGAP
20	47	14	7204 BE-2RZP
20	52	15	7304 BEGAP
20	52	15	7304 BE-2RZP
20	52	15	7304 BEGBP
20	47	14	7204 BECBP
20	47	14	7204 BECBM
20	47	14	7204 BECBJ
20	47	14	7204 BECBY
17	40	12	7203 BECBP
17	40	12	7203 BECBM
17	40	12	7203 BEP
17	40	12	7203 BEGAP
17	40	12	7203 BEY
17	47	14	7303 BE-2RZP
17	40	12	7203 BE-2RZP
17	47	14	7303 BEP
17	47	14	7303 BEGAP
17	47	14	7303 BECBP
15	35	11	7202 BEGAP
15	35	11	7202 BEGBP
15	35	11	7202 BEP