GB - Chinese national standards

Grade of valley area precipitation

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Grade of watershed areal rainfall

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Urban fire-danger weather ratings

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Test method of perforator materials for oil and gas well

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General requirements for perforator materials for oil and gas well

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Non-destructive testing (NDT) methods of steel tubes—Automated ultrasonic testing of seamless and welded steel tubes for the detection of laminar imperfections

Available languages: English, Chinese

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Steel slag powder used for cement and concrete

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Zinc-5% aluminum-mixed mischmetal alloy - coated steel wire and steel wire strand

Available languages: English, Chinese

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Electronic imaging—Test target for the black-and-white scanning of office documents—Part 1:Characteristics

Available languages: English, Chinese

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Electronic imaging—Test target for the black-and-white scanning of office documents—Part 2:Method of use

Available languages: English, Chinese

Available design: electronic design (pdf), Print design