The energy required is obtained from burning fuels, whether it be in gas or liquid form such as propane, kerosine, diesel or even vegetable oils!

所需的能量是从燃烧的燃料，无论是在气体或液体的形式，如丙烷，煤油，柴油，甚至植物油！

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It also supplies liquid oxygen, liquid nitrogen, acetylene, carbon dioxide, hydrogen, propane, freon, liquid ammonia, and rare element gas.

还兼营液氧、液氮、液氩、乙炔气、二氧化碳、氢气、丙烷气、氟里昂、液氨及其他高纯和稀有气体。

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Allow early payment of Winter Fuel Allowance to pensioners whose homes are not connected to the mains grid, and instead use oil, liquid petroleum gas or propane gas for heating.

BBC: Bill-by-bill: Guide to MPs' private members' bills

The bill would allow for the early payment of the winter fuel allowance to people whose homes are not connected to the mains gas grid and whose principal source of fuel is home fuel oil, liquid petroleum gas or propane gas.

BBC: Winter Fuel Allowance Payments Bill

These range from simple, but efficient, propane or liquid petroleum gas (LPG), to solar cookers.

FORBES: Cooking with Julia Roberts