Invention Grant
US3951855A Breath alcohol test medium 失效
呼吸酒精测试介质

Breath alcohol test medium
Abstract:
A standard breath alcohol test medium comprises a canister containing a charge of nitrogen and vaporized alcohol having a predetermined amount of alcohol per unit of volume therein, and means on the canister accommodating discharge of the nitrogen and alcohol mixture therefrom, preferably by pressure discharge or hypodermic extraction through a self-sealing septum in the wall of the canister. A method for filling the containers with a predetermined amount of alcohol vapor is also disclosed.
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