地上高 meaning in Chinese

agl above ground level

This paper discussed the material of equipmen t which was used to prepare diethyl oxalate by co coupling - regeneration reactio n wi th the method of weight . the seven kinds of metal material , such as 306 , 314l , 316l , zr , ti ( 2 ) , ti ( 10 ) , 1cr18ni9ti and one kind nonmetal material ( pe ) have been hung in the liquid compound in the regeneration reactor for 1500hours . the experiment ind icative that the corrosion rate of the 306 is the biggest , in the after is 316l , t i ( 10 ) , 1cr18ni9ti , zincorium ( zr ) , ti ( 2 ) , that of pe is lest ; 1cr18ni9ti is the better material of equipment
一传统地面交通方式存在的问题目前,我国的许多城市仍然采用单一的地面交通系统.同世界大城市的地上高架路、地铁、地面交通所组成的联合交通方式、多层次立体交通系统相比.存在着许多不足,在单一的平面路网中,大量的自行车流与人流,对公交车的干扰极大,使机动车的速度降低,加重了交通拥挤和乘车困难.如遇到客流高峰时间与节假日,则交通状况更为恶化