It consists of double layers of glass chips (three layers of glass chips is used by special requirement.), and around seal with special fireproof glue.
由两层玻璃原片(特殊需要也可用三层玻璃原片)，四周以特制阻燃胶条密封。
It consists of double layers of glass chips (three layers of glass chips is used by special requirement.), and around seal with special fireproof glue.
由两层玻璃原片(特殊需要也可用三层玻璃原片)，四周以特制阻燃胶条密封。
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