红宝石线嘴：此产品由不锈钢金属本体和宝石精密加工、组合而成，红宝石硬度仅次于金刚石，达莫氏9级以上，它是单晶体，可以制得极高的光洁度。能有效的保护漆膜及长时间连续工作，即能保证线圈的高绝缘性不受丝毫影响。

ruby nozzle:the product is made of stainless steel and ruby by precise processing and combination. the rigidity of ruby is above than the level 9 and is just less than that of diamond. it is a single crystal and can be made with high brightness and cleanness. it can effectively protect paint film and long-term continual work to ensure the high insulation of wire coil suffers no hurt.