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1. Oxford Dictionary

   pitch control

   • n.
     control of the pitch of a helicopter's rotors or an aircraft's propellers.；control of the pitching motion of an aircraft.

   • noun: pitch control

2. • 更多解釋

   pitch control

   • IPA[piCH kənˈtrōl]

   • n.
     control of the pitch of a helicopter's rotors or an aircraft's or ship's propellers.

   Oxford American Dictionary