Expressions about reducing gas generating reaction by air - coal method were established.

建立了空气 - 煤炭法发生还原煤气的化学反应表达式.

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Especially almonds, since ancient times was considered to cough Runfei, reducing gas - fire health food.

尤其是杏仁, 自古就被认为是能止咳润肺 、 降气清火的健康食品.

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