Q: throughout its history, humankind has sought the help of mystical symbols (see "symbols and talismans").
A: Throughout its history, humankind has sought the help of mystical symbols (see "Symbols and Talismans").

Q: prudent development - a shared responsibility
A: Prudent development - a shared responsibility

Q: and oman has undergone a tremendous change since it became independent of great britain. until the coup of 1970 oman was a closed country with a medieval government and extreme poverty.
A: And Oman has undergone a tremendous change since it became independent of Great Britain. Until the coup of 1970 Oman was a closed country with a medieval government and extreme poverty.

Q: the right level of lifting force and response time can be achieved by adjusting the operating pressure.
A:
The right level of lifting force and response time can be achieved by adjusting the operating pressure.