中硬度 meaning in English

medium hard

Fibreboards - specifications - part 3 : requirements for medium boards ; german version en 622 - 3 : 2004
纤维板.规范.第3部分:中硬度板的要求
Helix angle45 to 50 2flutes , 3flutes , 4flutes are applicable to process middle hardness steels , the stainless steel , ti alloy . its cutting efficiency is doubled
螺旋角45至50二刃、三刃、四刃以适用于加工中硬度钢铁、不锈钢、钛合金、镍合金等高硬度材料的高速切削，效果更佳。
Double - ray roller breaker is mainly used in crushing medium hard materials like ore , coal , coke , slag etc . it is mainly applicable to mineral , electrical power plant , coal , construction , chemicals plant etc
双光辊破碎机主要用来破碎矿石，煤，焦碳，炉渣等中硬度物料，广泛应用于矿山，电力，煤炭，建筑，化工等行业。