Answer:
If there is a shaft with headgear, then mining can take place until that depth of the shaft. If it is accessed horizontal Adits, it can mine until the lowest Adit from upwards. If it is accessed decline, the development and mining can continue so long as economic exploitation is possible.
Explanation:
What are the disadvantages of mining headgear? They totally cut off your vision of anything above your head. They are hot, most of the time
Answer:
Everything I got what you need
Answer:
B
Explanation:
Keep only what is used. Remove all unnecessary items. Red tag these items for review.
Answer:
C
Explanation:
Sumerians invented new technologies and perfected the large-scale use of existing ones. In the process, they transformed how humans cultivated food, built dwellings, communicated and kept track of information and time
Answer:
The function of the Deaerator is to remove dissolved non-condensable gases and to heat boiler feed water.
Explanation:
