Sensortechnics
presents a new series of isolated diaphragm solenoid valves from Parker Life Sciences. Liquid X valves are high-performance, two-way normally closed or three-way universal fluidic control devices. Liquid X is designed for compatibility with a wide range of aggressive liquid and gaseous media, such as bleach, acids and chlorinated solvents.
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英國鐵路公司如何推動凈零排放
It would be better if the trains had good coverage of the country. Large areas have no easy connection and so cars (or buses?) and lorries are still...