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www.ChineseStandard.net Database: 189759 (12 Oct 2025)

JB/T 7402-2024 English PDF

JB/T 7402: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JB/T 7402-2024EnglishRFQ ASK 3 days [Need to translate] (Parallel flat crystal) Valid JB/T 7402-2024
JB/T 7402-1994English359 Add to Cart 3 days [Need to translate] Optical parallel Obsolete JB/T 7402-1994

Basic data

Standard ID JB/T 7402-2024 (JB/T7402-2024)
Description (Translated English) (Parallel flat crystal)
Sector / Industry Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard N34
Classification of International Standard 17.180.30
Date of Issue 2024-10-24
Date of Implementation 2025-05-01
Issuing agency(ies) Ministry of Industry and Information Technology
Summary This standard specifies the materials, dimensions, grouping, complete set configuration and technical requirements of parallel crystals, describes the corresponding test methods, and specifies the inspection rules, signs, packaging, transportation and storage. This standard applies to the manufacture of parallel crystals that measure the flatness and parallelism of the surface by measuring the micrometer of the outer diameter by light wave interference and measuring tools such as lever calipers.