Sikorsky MH-53-from rusted warfare and mod(MOD from http://guanghuiyuhuo.ys168.com/?xzpd=1)

way to control-

1- blade angle
3- warehouse door
4- auxiliary fuel tank
8-engine

The US Air Force ordered 72 HH-53B and HH-53C variants for Search and Rescue units during the Vietnam War, and later developed the MH-53J Pave Low version for Special Operations missions.

The Pave Low's mission was low-level, long-range, undetected penetration into denied areas, day or night, in adverse weather, for infiltration, exfiltration and resupply of special operations forces. Pave Lows often worked in conjunction with MC-130H Combat Talon for navigation, communications and combat support,and with MC-130P Combat Shadow for in-flight refueling.

The large green airframe of the HH-53B earned it the nickname "Super Jolly Green Giant". This name is a reference to the smaller HH-3E "Jolly Green Giant", a stretched variant of the H-3 Sea King, used in the Vietnam War for combat search-and-rescue (CSAR) operations.-wiki