The configuration and principle of anti rotary plug and necessary float collars and their applications in intermediate casing cementing are introduced.
介绍了防转胶塞及配套浮箍的结构、原理和在技术套管固井中的应用情况。
The utility model relates to a rotary two-pole flat plug, suitable for a two-hole and three-hole flat jack socket using an AC power supply.
一种可旋转的二极扁插头，适用于交流电源两、三眼扁插孔插座。
A rotary electric connector plug, gang socket and cordless electric heater is dislosed.
本发明涉及旋转电连接头、电连接座及无绳电热器具。
应用推荐