What does DA stand for?

Dissolved Acetylene

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

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Samples in periodicals archive:

BOC Pakistan Limited, which has operated in Pakistan since its inception, owns and operates various air separation units, CO2, dissolved acetylene, N20, other gases compression facilities and welding electrode manufacturing plants.

Pakistan: BOC Pakistan announces Rs 100 million (US$1.301 Million) ...

Such reaction is the principle behind the production of dissolved acetylene which is the only modern industrial use of calcium carbide.

Calcium Carbide?the Illuminating Chemical Compound