Self-Drilling Anchor bolt (SDA) are full threaded hollow rock bolts which used in the drill string during drilling of a support hole, and grouted into the hole.
The single screw air compressor for cutting is a type of compressor that uses a single screw rotor to compress air. It is commonly used in cutting applications due to its efficient and reliable performance. This type of compressor has a simple design and
* High precision measurement of three phase voltage,three phase current,active power,reactive power,apparent power,power factor frequency and other electrical parameters.* Positive/reactive power/reactive power measurement.* Timed meter reading and timed