1. Aquifers could be used as carbon stores, if they could be made gas-tight.

2. Thermodynamics theory gastight was used to analyze the quick plenum process of bladder accumulator used for deep sea microbe gastight sampler.

3. The Al-si Alloy modified by tellurium is an ideal material for making high gastight castings.

4. After a new installation or maintenance for hydrogen system, pressure test, flushing and gastight test must be done.

5. Recirculation fumigation equipment was used to ventilation after the warehouse was rebuilt in gastight and heat insulated.