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在修理各种带有外压和嵌入式玻璃表面的仪表(例如压力表等)时,由于长期使用,橡皮垫圈老化与玻璃粘接在一起,表面很难打开。用一只皮碗(安上木柄)压在表面上,利用真空原理
When repairing various types of instruments (such as pressure gauges) with external pressure and embedded glass surfaces, the surface is difficult to open due to the long-term use of rubber gasket aging and glass bonding together. With a cup (on the wooden handle) pressed on the surface, the use of vacuum principle