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Agricultural chemicals
Includes chemicals designed for agricultural use for protection of crops from fungus and insects, as well as for the growth and protection of plants.
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焦
Transportation; Railway
早期的蒸汽機車在英國使用焦炭作為燃料,而不是煤,因為早期的法律要求,機車應 '消耗自己的煙'。煤炭生產煙時燒而焦碳燃燒煙幾乎免費。焦是由加熱軟煤密閉烤箱中創建的。加熱,如煤分解給硬、 多孔、 灰白色的物質,稱為焦,其中包含幾乎 90 % 的碳。燃燒時,可樂產生強烈的、 無煙熱。焦的副產品製造是煤氣、 被廣泛用於工業和國內天然氣從北海到來之前,英國加熱。因此, ...