| 摘要 |
Hand-held tear gas canisters and personal security devices utilizing same employ a tactile device, preferably in the form of an elongate ridge or rib, is provided on the outer surface of the canister, or on a holster which receives the canister, to facilitate orientation of the canister with a gas discharge nozzle thereof pointing away from the user. In use, by feeling the position of the ridge or rib, the user will be aware of the direction of gas discharge and can thereby avoid misdirection of the gas.
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