5312/5324 IP Phones User Guide Feature Keys You can use (MENU) on your phone or the Desktop Tool to program the personal keys as feature keys. The Desktop Tool is a browserâbased interface that makes programming quick and easy. For more information on using the Desktop Tool, please contact your System Administrator.312/5324 IP Phones User Guide Feature Keys You can use (MENU) on your phone or the Desktop Tool to program the personal keys as feature keys. The Desktop Tool is a browserâbased interface that makes programming quick and easy. For more information on using the Desktop Tool, please contact your System Administrator.
What is Surface Mining?. Surface mining involves removing the overburden of a mining site to expose the resources below. Overburden consists of the rocks, soil, and mineral deposits that sit over the materials that are to be mined.
Common techniques for surface mining include: 1  open-pit mining and quarrying â the recovery of materials from an open pit in the ground. 2  strip mining â the targeted removal of surface layers to reveal the useful ore/seams underneath. By contrast, sub-surface mining consists of digging tunnels or shafts into the ground to reach deeply buried ore deposits.