GB - Chinese national standards

Piping compensatory couplings

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Quality reqirements for fusion welding of metallic materials - Part 1: Criteria for the selection of the appropriate level of quality requirements

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Quality reqirements for fusion welding of metallic materials - Part 2: Comprehensive quality requirements

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Quality reqirements for fusion welding of metallic materials - Part 3: Standard quality requirements

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Quality reqirements for fusion welding of metallic materials - Part 4: Elementary quality requirements

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Quality requirements for fusion welding of metallic materials - Part 5: Standard documents need to conform to claim conformity to the quality requirements

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Solid wire electrodes, tubular cored electrodes and electrode/flux combinations for submerged arc welding of creep-resisting steels

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Geometrical product specificationsGPS) - Wooden part - Limit and fit

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Geometrical Product Specifications(GPS)--Surface texture:Profile method--Surface roughness parameters and their values for wooden pieces

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Method of test for explosion limits of combustible gases in air

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