1) to control volatile organic compounds leakage point (VOCs) that are important in the Government's policy by definition of significant leakage points have come from the conclusion of the opinion of the Department of pollution control. Department of plant industry and representatives of the entrepreneurs in the area, which consists of two parts: (1) leakage from devices (category 4), and (2) leakage from operating methods which control the leakage from the device are referred on the basis of the environmental organization, United States National Guard (US.EPA) best practices from the leakage, it is good practice to use. By focusing on a closed cover or make up a closed system so that they do not cause evaporation/leakage of substances released into the atmosphere.
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