I would like to ask the master who, I now just do water and electricity installation, I would like to learn the calculation of the formula of crossing the zinc trough, 40 degrees 90 degrees, there are three links four practices, please teach me what teacher. Thank you. More
First one of the two wires with a wire clamp to bend a small hook, a hook with a wire into the wire tube, until the wear
1 To the hardware store to buy two 18 # thin wire, the length of the wire tube to the other end of the distance, plus 2 meters
And then another hook with a wire from the other end of the line into the mouth, according to the length of the first penetrate into the root, while the edge of the wire to do 360 degrees of rotation, according to feel or sound to confirm the two wires have been After twisting, slowly pull out, to the other one to bring out (Brought out of the head of the head out, with another root from the line, can not pull out too much) And then hang the wire to the left of a wire, tighten, from the other end of the wire slowly pulled out to pull the wire out to stop In the process of pulling out the wire or wire, the best someone else from the other side of the delivery, the two will be much better with the effect 2 Determine the direction of the wire tube, with the wire to the blocked position, in the wire to do the mark, pull out the wire, according to the length of the block to find the approximate location, and then cut the wall or ground inspection Repair the wire tube, into the wire after the repair decoration In the absence of a certainty whether the wire tube is really blocked, the previous method should be tested several times, and the method 2 should be used again
