National and international valves common standard code

National and international valve common standard code: CVA-- Valve Association Standard BS-- British National Standard EJ--Ministry of Nuclear Industry Standard JIS--Japanese Industrial Standard YB--Ministry of Metallurgy Standard DIN-- German Standard HGHGJ--Ministry of Chemical Industry

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Precursor chemicals management regulations

Precursor Chemical Management Regulations (Full Text) Chapter I General Provisions Article 1 In order to strengthen the management of precursor chemicals, regulate the production, operation, purchase, transportation, import and export of precursor chemicals, prevent precursor chemicals fr

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