8. The connecter jack one will clean dust and put it into washing bag and then the dust could be removed with sewage which will not pollute the floor again.
插座式拖把将灰尘从地板上擦除后放入清洗袋中清洗，灰尘随污水排出，不会再带回地板。
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9. Discuss the principle for selection of quality testing device and equipment of electric connecter and its components and equip the reasonable testing method.
论述电连接器及其组件质量检测仪器设备的选用原则和配备合理性检查方法。
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10. Discuss the principle fer selection of quality testing device and equipment of electric connecter and its components and equip the reasonable testing method.
论述电连接器及其组件质量检测仪器设备的选用原则和配备合理性检查方法。
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11. The emery paper is applicable in the grinding and polishing of most work pieces including metal, metal alloy, ceramic, optical element, fiber connecter, hard disc and semiconductor, etc.
12. Electric power is output to the oil tube, which is connected with the bushing by the oil bushing connecter on the bottom of the oil tube, via a 3-phase transformer after AC-DC-AC inverse circuit.
电能由三相配电变压器经AC DC AC逆变电路输出传送到油管，经油管下部的油套管接触器连接到套管，形成一个完整的回路。
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13. Scissor lifter the scissor lifter can easily raise the goods to a higher place. It can be used as goods elevator, connecter of the conveying line, and facility of loading and unloading on ground, etc.
14. Scissor lifter the scissor lifter can easily raise the goods to a higher place. It can be used as goods elevator, connecter of the conveying line, and facility of loading and unloading on ground, etc.
