| 摘要 |
A system protecting against intrusion, burglary, theft, or assault has sprayers fed with vitriol or hydrochloric acid or alkali from a reservoir by a battery operated pump via three tubes braided together. - The system is resistant to acids and alkalis and may be an adapted windscreen washer. The sprays are pref. directed out of windows or embrasures if a vehicle, room, or container is opened and a circuit breaker not activated. The acid or alkali pref. contains a dye.
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