Ainda não temos significados para "crude acetylene".
1Carbide which yields less than 270 litres of crude acetylene per kilogramme need not be accepted.
2Phosphorus, sulphur, and ammonia are not objectionable in crude acetylene because they confer upon the gas a nauseous odour.
3Such substance may conceivably be one of the impurities in crude acetylene, or the solid matter of a bleaching-powder purifying material.
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