Rescue sites will often be unstable and hide many dangers: broken glass, protruding nails, weakened floors or stairs, downed electrical wires, escaping gas, broken sewer and water pipes.
Trimethylamine (TMA) gas is the main gas come from deterioration of fish and one of the major odor gases existing in urban sewer.
三甲胺(TMA)气体是鱼类水产品变质后释放的主要气体，也是城市下水道释放的主要恶臭气体之一。
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Trimethylamine (TMA) gas is the one of major odor gases existing in urban sewer. Recent researches in TMA gas sensor focus on inspecting freshness of fish.