But now the full glass with the specification is not the same, except before the structure, working mechanism, the life is changed, the vacuum tube production and steps also change.

但现在这种全玻璃的集热管跟以前不一样了，除了结构、工作机理、寿命发生了变化，真空管的生产和步骤也发生了变化。

youdao

But now the full glass with the specification is not the same, except before the structure, working mechanism, the life is changed, the vacuum tube production and steps also change.

但现在这种全玻璃的集热管跟以前不一样了，除了结构、工作机理、寿命发生了变化，真空管的生产和步骤也发生了变化。

youdao