Examine the pressure meter tube and valve, pressure meter cover glass, if it is dirty, clean it with diluted hydrochloric acid.
检查压力表管道及阀门是否畅通，灵活，压力表面玻璃如有污，可用稀盐酸拭净。
Sunlight energy is collected by glass vacuum tube and metal superconductive tube transmits heat to the pressure-bearing water tank to heat up water.
太阳光能量通过玻璃真空管采集，由金属超导热管传热至承压水箱内把水加热。
Sunlight energy is collected by glass vacuum tube and metal superconductive tube transmits heat to the pressure-bearing water tank to heat up water.
太阳光能量通过玻璃真空管采集，由金属超导热管传热至承压水箱内把水加热。
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