About 22% of the energy used in the U.S. comes from natural gas. There are about 300,000 miles of natural gas pipelines in the lower 48 states and 425,000 gas producing wells. The history of natural gas.
thru-hole. A circuit board packaging technique in which the leads (pins) on discrete components and chips are inserted through holes in the printed circuit board and soldered from beneath.
To make a hole in or through, with or as if with a drill. 2. To form (a tunnel, for example) by drilling, digging, or burrowing. v.intr. 1. To make a hole in or through something with or as if with a drill: three types of protein that enable the cells to bore in and out of blood vessels (Elisabeth Rosenthal). 2. To proceed or advance steadily or laboriously: a destroyer boring through heavy seas. n. 1. A hole or passage made by or as if by use of a drill.