[中 文] SHJ－Y液壓式上擊器SHJ－Y Hydravlic JarSHJ－Y液壓式上擊器是根據液體的不可壓縮性和縫隙溢流延時作用，將彈性變形能迅速變成卡點處的巨大的瞬時動能使遇卡管柱解卡。
[English] SHJ－Y?。葃draulic Jar will turn elastic reformation energy into Vastinstantaneouaus dynamic energy at block point and make blocked Youreleased at once according to the principle that liquid can not be compressed and can overflow from joints
