super是什么意思 extra

extra super超超1Experimental study of rheological property of extra ( super) heavy oil特（超）稠油流变特性试验研究及应用 2The invention provides an integrated water tank type crystallizer used for casting 7 series extra super duralumin alloy， relating to a crystallizer.用于铸造7系超硬铝合金整体水箱式结晶器，它涉及一种结晶器。