质量标准：1、尺寸正规、标准、外观整齐；
2、能承受折弯、变形无损伤；
3、两头无毛刺，与氧气带接头连接顺畅，确保进气量；
4、每根进行防漏气打压试验，无漏气现象。
Quality standard: 1. Formal, standard and neat appearance;
2. Can withstand bending and deformation without damage;
3. No burr at both ends, smooth and smooth with the oxygen belt joint to ensure the air intake;
4. Air leakage suppression test for each root, no leakage phenomenon.
