开工率: utilization of capacity; ope ...即: approach; reach; be near设备: equipment; device; facility; ...的: 4次方是 The fourth power of 2 i ...有效: effective; valid; efficaciou ...使用: make use of; use; employ; ap ...期: designated time与: take part in; participate in修理: repair; mend; overhaul; fix; ...比: 2有效使用期: effective age; effective life; effective service life; useful economic life适用期（有效使用期）: pot life working life有效寿命；有效使用期: effective life船舶有效使用期限: ship's effective life有效使用期限3: effective age工具的有效使用: tooling availability轧辊直径的有效使用范围: roll dimensional life电器设备的安装与修理: electric appliance installation and repair空调设备的安装与修理: air conditioning apparatus installation and repair有效使用: use efficiently最有效使用: highest and best use生产设备有效使用寿命: production life商务谈判中英语的有效使用技巧: effective english communicating skills in business negotiation一次有效使用: one-time operation有效使用寿命: acceptable life; useful service life
