0:02
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Pneumatic air valve connect
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0:01
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Short light clicking of an elevator button being depressed
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0:01
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Solid clunk of electrical equipment jack connector into socket
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0:12
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Dial tone, numbers keyed, ring tone heard, hook flash button pressed. Heard through earpiece.
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0:06
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Air valve release hose connect, leak, hollow hiss.
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0:01
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Air valve, release hose connecting - short metallic his.
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