High head

high head dam

high head development

high head hydropower station

high head lock

high head pump

High head ratio

high head water power plant

High-head

high—head

hydropower station under high head and lower flow

Hydropower Station with high head

Maternal care for high head at term

Packing seal of high head

super high head

High carbon and high molybdenum high speed steel

High Carbon High Vanadium High Speed Steel

high vanadium and high cobalt high speed steel

abnormal high temperatures and high pressures packet

artificial static high temperature and high pressure