Mmiri na-achịkwa hydraulic bụ valvụ na-achịkwa nrụgide mmiri, nke mejupụtara valvụ isi na eriri ya, valve pilot, valve agịga, valve bọọlụ na nlele nrụgide.Dị ka ebumnuche dị iche iche, ọrụ na ebe dị iche iche, enwere ike ịmepụta ya n'ime valvụ na-ese n'elu mmiri, nrụgide ...
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