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The Interborough Rapid Transit subway, which broke ground in 1900 after many years of political maneuvering, was not the first attempt at transit tunneling in New York City. Several other groups attempted to build tunnel lines with varying degrees of success. Probably the most well known of these early attempts, at least in terms of subway lore, was an 1870 demonstration line, the Beach ...

Pneumatic hammer drills combine the rotation of regular drills with a hammering action. This gives them the ability to create holes in masonry easily. If you want to buy one of these drills, there are a few things you will need to consider. This article will give you a few tips for buying pneumatic hammer drills. Depth Rod You should always buy pneumatic hammer drills that have a ...