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GB/T 22047-2026

Upcoming

Determination of the ultimate aerobic biodegradability of plastic materials in soil—Method by measuring the oxygen demand or carbon dioxide evolved in a closed respirometer

Issued: 2026-05-25
Effective: 2026-12-01

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GB/T 220-2018

Published

Determination of carboxyreactivity of coal

Issued: 2018-02-06
Effective: 2018-09-01

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