优选值 meaning in English

preferred value

Photographic lenses ; inscription and preferred values
照相镜头.第11部分:注册和优选值
Components for electronic equipment . preferred diameters of wire terminations of capacitors and resistors
电子设备元件.电容器和电阻器接线端子直径的优选值
Electrical relays . part 14 : endurance test for electrical relay contacts - preferred values of contact loads
继电器.第14部分:继电器触点寿命试验.触点负载优选值
Electrical relays - specification for contact loads of preferred values used in endurance tests for electrical relay contacts
继电器.第4部分:继电器触点疲劳试验接触负载优选值规范