Another corresponding surface of the surface fastener is on the supporting plate.
表面紧固件的另一对应的表面在支承板上。
2
The utility model relates to a two-polarity ultrasonic transducer, composed of a fastener, a reflecting plate, a piezocrystal, a sound direction output plate, and an oscillation amplifying circuit.
Abstract:The paper compares the cost performance of four practice of wall fastener by value engineering principle, such as embedded pipe, embedded steel bar, embedded steel plate and after the anchor.