bouldern.大圆石;巨砾
bouldery ground砾质土
boulder crusher粗碎机
boulder cracker岩石破碎机,岩石破碎器
boulder blasting爆破大石,分块钻孔,二次爆破
boulder concrete卵石混凝土,蛮石混凝土
boulder pavement漂砾通径
Boulder frequency大块率
boulder clay soil泥砾土
boulder foundation粗砾地基
boulder prospecting漂砾勘探