... needed in the measurement is acid or alkaline, high borosilicate glass avoids the pollution of each other. 4. The vacuum ... adsorbed. 6. Each part of the section selects high borosilicate glass, meet the system requirement of high vacuum, transparent to ... Adsorption Trap, Cooling Chamber, Pipeline, Vacuum Hanging-up, Glass Section, Standard Connector with Electric Control 1 Measurement System 2 ...