Approved Explosion Proof Coal Cutting Equipment

Excerpt from Approved Explosion-Proof Coal-Cutting Equipment Percentages of methane under per cent, when mixed with large volumes of coal dust in suspension, make a mine atmosphere more dangerous than when it contains coal dust alone. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.