The first cold wave always arrives without warning. In a demonstration experiment released by the Seoul Arisu Headquarters this past March, a mechanical water meter shattered after being exposed to minus 5 degrees Celsius for 8 hours and 5 minutes. It could not withstand minus 10 degrees Celsius for even five hours. This explains why the glass on water meters is often found cracked in the morning if cold drafts blow into the hallways overnight.
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The first cold wave always arrives without warning. In a demonstration experiment released by the Seoul Arisu Headquarters this past March, a mechanical water meter shattered after being exposed to minus 5 degrees Celsius for 8 hours and 5 minutes. It could not withstand minus 10 degrees Celsius for even five hours. This explains why the glass on water meters is often found cracked in the morning if cold drafts blow into the hallways overnight.
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