Parcel Select. Parcel Select is an economical choice for large or heavy packages and is the only USPS service that can be used for packages over 108 in girth.
double digging. noun. 1. (Brit) a method of digging ground in a series of trenches two spits deep, mixing the soil of the bottom spit with manure, and then transferring the soil from the top spit of one trench to the top spit of the preceding one. Examples from the Web for double digging.
Borehole Mining (BHM) is a remote operated method of extracting (mining) mineral resources through boreholes by means of high pressure water jets.This process can be carried-out from land surface, open pit floor, underground mine or floating platform or vessel through pre-drilled boreholes. A borehole is drilled from land surface to a desired depth, where then actual borehole mining will take place. 2  A casing column is lowered down the hole.