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Coal and petroleum.
Science Coal and petroleum.

1. COAL AND PETROLEUM TOPICS 1.1 Inexhaustible natural resources 1.2Exhaustible natural resources 1.3Coal (a) Coke (b)Coal tar (c) Coal gas 1.4Petroleum 1.5Refining of petroleum…

Coal and petroleum.
Science Coal and petroleum.

1. COAL AND PETROLEUM TOPICS 1.1 Inexhaustible natural resources 1.2Exhaustible natural resources 1.3Coal (a) Coke (b)Coal tar (c) Coal gas 1.4Petroleum 1.5Refining of petroleum…

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