Check of tube surface. Cut the tube to be tested. About 2 meters is divided into. 1: cut to bite the skin and salt and acid to check tube and tube inner surface coating. Option 2: cut 4-10 test. And the 17-18
Check of tube surface. Cut the tube to be tested. About 2 meters is divided into. 1: cut to bite the skin and salt and acid to check tube and tube inner surface coating. Option 2: cut 4-10 test. And the 17-18