中空玻璃生产如果经过多个环节，在哪个环节增加设备才能获得大的效益以及小的投入呢？
If there are many links in the production of hollow glass, in which link can the equipment be added to the maximum benefit and the mi
在运用封胶机时要留意哪些事项：
What should we pay attention to when using sealant machine?
1.混合胶在胶枪内滞留工夫必需控制在3-5分钟内，否则蜂鸣器报警。
1. Mixed glue must be kept in rubber gun for 3-5 minutes
