预应力机架 meaning in English

pre stressed stand
preloaded stand
prestressed stand

Additionally , rushing - board brake is parallel - adjusted so that its very convenient for users to adjust it . iii . j53 - 630c model is improved on base of j53 - 630b model , retaining advantages of j53 - 630b model such as air cylinder control , steel structure platform , rushing - board brake and integrated pre - stressing force machine frame
三j53 - 630c型在j53 - 630b型的基础上的改进型，保留了j53 - 630b型产品的优点，气缸操纵，刚结构式平台，推板式刹车整体预应力机架。