单词	trenchermate
释义	同Trencher-mate
随便看	negative prescription negative pressure negative pressure breathing negative pressure grainage negative pressure isolation room negative pressure load negative pressure protection system negative pressure real casting negative pressure relief valve negative pressure slider negative pressure slider，nps negative pressure vacuum hot wall furnace negative pressure valve negative primaries negative--primary negative principal planes negative principal points negative profit negative program negative proposition negative proton negative proton, antiproton negative proton; antiproton negative pulse negative pyritohedron