The Q series circular electric interlock volume is small, the weight is light, bayonet socket momentary connection, operation use simple convenient, inserts the needle, the jack lead wire to use the welding type. The product mix is advanced, the electric interlock of performance is fine, the low in price, the performance-to-price ratio is high, is widely used electric interlock between each kind of electronic instrumentation, in electrical equipment's. Product according to Ministry of Electronics Industry standard SJ1744 manufacture. The product needle, the hole may act according to your request exchange.