Coal Bunker, Coal scuttle, Coal hod
Yes, coal miners mine coal.
The finest quality coal is called the bituminous coal, it is finer than the lignite coal.
Another name for bituminous coal is soft coal.
Bituminous coal is a soft coal, compared to anthracite coal, a hard coal. Bituminous coal is a long-burning, hot burning source of fuel.
John R Duda has written: 'Basic estimated capital investment and operating costs for underground bituminous coal mines utilizing a continuous mining system' -- subject(s): Coal mines and mining, Bituminous coal, Costs
Coal mining is often viewed as bad because it is dangerous and robs the earth of a natural resource. Long before government safety regulations, coal miners were frequently killed from explosions (caused from the slightest spark meeting natural gas), cave-ins, lung cancer from continuous exposure to coal dust, and other freak accidents.
Coal was a good source of fuel in the 1860's in the US. Large deposits were used for industry then and even today, coal mining continues in places such as West Virginia. In 1860, however, geologists had maps of where they believed that large coal deposits lay deep underground. One line of coal, for example was a continuous line stretching from the middle of Pennsylvania southward to central Alabama. Another large coal field lay beneath the cornfields of Iowa and Illinois.
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Coal is not a suitable automotive fuel as:It is not compatible with internal combustion enginesRequires complex handling and combustion systemsProduces solid wasteHas no distribution system at the user levelContains sulfur compoundsEmits radiationRequires continuous firing - no off on on capacity
Continuous or might be discontinuous.
coal
Robert A. Crovellli has written: 'Fractal lognormal percentage assessment of technically recoverable natural gas resources in continuous-type and coal-bed (unconventional) plays, onshore and state waters of the United States' -- subject(s): Statistical methods, Coal, Fractals, Natural gas
Coal mines, coal bins, coal hods, and anywhere coal is or was.
An analog signal is characterized by continuous amplitudes and continuous time.
Present continuous: He is driving. Past continuous: He was driving. Future continuous: He will be driving. Present perfect continuous: He has been driving. Past perfect continuous: He had been driving. Future perfect continuous: He will have been driving.
This form of the verb can be used in more tenses: present participle, present continuous, past continuous, past perfect continuous, future perfect continuous, future continuous, present perfect continuous.