In 1968, plant began to liquefied petroleum gas ( LPG ) instead of acetylene cutting.

1968年, 该厂开始以液化 石油气 代替乙炔切割.

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In 1968, the plant began to liquefied petroleum gas ( LPG ) instead of acetylene cutting.

1968年, 该厂起头以液化 石油气 代替乙炔割切.

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The prices of natural gas and liquefied petroleum gas ( LPG ) , however, remain unchanged.

天然气和 液化气 价格则保持不变.

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