GB - Chinese national standards

Methods for the calibration of vibration and shock transducers—Part 43: Calibration of accelerometers by model-based parameter identification

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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

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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

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

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

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