Product Parameter (Specification)
Crystal World Cup
About the products, It's worth mentioning that our products are of Japanese and Korean quality, the material is High Grade A K9 crystal, more clearer and stronger.We can assure you the quality of this item we provided are the best in. The market as we have a very strict quality test before we pack and ship out the items.
on the classification of glass and metal sealing, pointed out that in addition to the two direct sealing, there is a kind of indirect sealing, in which low-melting glass powder solder has been widely used in indirect sealing.Due to the direct sealing between the lead glass used in the core column of the electric vacuum device and the sodium calcium glass used in the glass shell, the high temperature of 950 ~ 1050℃ is required, which will damage the performance of the cathode and the aspirating material.It is ideal if it can be sealed at 500 ~ 600℃.