调查提出了以下垃圾回收的建议：联系市府，让它派人回收不需要的大型电器——欧盟法律规定这些电器必须进行回收——不过可能需要收费。
Among its recycling tips are contacting the local council to ask it to pick up unwanted large electrical products - they must collect under EU law, but may charge a fee.
所有电路和电器安装，应在良好的条件下，符合规定。有可靠的绝缘，控制方便。
All the circuitry and electrical installation should be in good condition, meet the requirement of power machine, with reliable insulation and convenient control.
继电器往往会以开关时间规定一个重复率，或者说是工作频率，使用时需低于该值。
A repetition rate, or operating frequency, lower than that allowed by the switching times is often specified for a relay.
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