型号(model) | 参数(parameter) | ||||
d | d | l | m | ||
a | er11a | 19 | 17 | 11.3 | m14×0.75 |
er16a | 28 | 25 | 17.5 | m22×1.5 | |
er20a | 34 | 28.5 | 19 | m25×1.5 |