The tube spacing cattle brand products have reached the theoretical limit of 61 mm, inner tubehole connection is only 7mm.
目前牛牌产品的管间距已达到理论极限—61毫米，内胆管孔连接处仅为7 mm。
2
The upper cover and base plate of energy-saving lamp cup are provided with holes for ventilation and heat dissipation, and the base plate is provided with a light tubehole.
节能灯杯上盖和节能灯杯底板上均设有通风散热孔，并且在节能灯杯底板上设有灯管孔。
3
Vacuum tube encryption arrangement looks easy, it is very difficult, the main problem is a liner tubehole connection is too narrow after the processing difficulty, easy deformation.