| glass vacuum system envelopes | selubung sistem vakum kaca |
| glass vacuum system envelopes | |||
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| glass | kaca, gelas, cermin |
| vacuum | kekosongan, hampa udara |
| system | kb. 1 sistim, susunan. school s. sistem sekolah. 2 jaringan. 3 cara. |
| envelopes | - |