322 MODERN STEAM PRACTICE . exhaust K ; at the same instant the flap valve T opens upwards … F i s \ 2 7 ; 7 , Sect l 0n T 0 / ® llde , Va ' ve & remaining relief valves are brought into ac - . Relief Valves for Hydraulic Crane . 0 0 e e , Exhaust passages . j , Pressure tion in the same manner - By these means pipe . K , Exhaust , p p , Pressure a li r isk of concussion is avoided , and…
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