Sentence examples for coals has a from inspiring English sources
Fracture system (micro- and hydraulic fracture) of coal marcolithotypes, namely the bright (B), semi-bright (SB), semi-dull (SD), and dull (D) coals has a great influence on the coalbed methane (CBM) seepage in microfractures as well as gas production in hydraulic fractures.
The studies showed that for coals having a high level of NGM, feed rate could be one of the critical parameters affecting the efficiency of separation.
These coals have a relatively high feed ash and are generally difficult to wash due to high proportions of near-gravity material (NGM).
Most Indian coals have a considerable proportion of fixed ash due to 'drift origin' of Gondwana formation in Permian age (Khoury 1981).
The CMs such as coals have a very high porosity; in particular, the sheared coals possess three to eight times more porosity and two to ten times more specific surface area than normal coals (Li and Ogawa. 2001).
Second, coal has a role outside the power sector, in industrial and household demand.
Coal has a primitive, passé image, but it is actually enjoying an Indian summer.
If coal has a future, it is surely elsewhere.For many, that means Asia.
From an entrepreneur's point of view, coal has a tremendous advantage.
Abbott said "coal has a big future as well as a big past".
