easy quail pen

1, first of all, the net surface is smooth, mesh are four lines, pitch is the same, whether the weft wire bending (note: the net width is the length of the weft wire), normal weft wire passes through the straight wire of welded wire mesh, with accurate time and the silk repeated welding, make the pitch of welded wire mesh is consistent, with smooth surface, into a square hole, when the net vertical position from the top downwards see, weft wire is straight.

If the zinc coating is good, but in 3% nitric acid when the light, the coating has dark shadow, passivation occurs when the film is brown, may be caused by foreign metal impurities such as copper or lead in the galvanizing liquid. When problems occur in the process of galvanizing large coil galvanized wire, the temperature and current density are checked first, and then the content of zinc and sodium hydroxide in the plating solution is measured and adjusted through the analysis of the plating solution. Whether DPE content is low can be determined by hull cell test.