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CSA C22.2 No. 221
Electrically heated hobby and educational type kilns
Edition
2020-10-01
DVGW G 221
Guideline for the Application of the DVGW Codes of Practice to the Pipline Bound Supply of the General Public with Hydrogen-containing Fuel Gases and Hydrogen
Edition
2021-12
DVGW W 221-1
Residues and By-Products of Drinking Water Treatment Plants - Part 1: Principles for Planning and Operation
Edition
2020-02
DVGW W 221-2
Residues and By-Products of Drinking Water Treatment Plants - Part 2: Treatment
Edition
2023-05
DVGW W 221-3
Rückstände und Nebenprodukte aus Wasseraufbereitungsanlagen - Teil 3: Vermeidung, Vermarktung und Verwertung
Edition
2014-07
DVGW W 221-4
Residues and by-products of drinking water treatment plants - Part 4: Use of backwash waters from drinking water purification
Edition
2016-03
DWA-A 221
Grundsätze für die Verwendung von Kleinkläranlagen
Edition
2019-12
ISO/TS 10303 AP 221 Application modules
Industrial automation systems and integration - Product data representation and exchange - AP 221 Application modules
Edition
2005-12
OEWAV RB 221
Skipisten und Betrieb von Beschneiungsanlagen - Überarbeitete Neufassung der OEWAV-Regelblätter 210 und 212
Edition
2022-05
BS PAS 221
Prerequisite programmes for food safety in food retail. Specification
Edition
2013-02-13
