curve of area of transverse section
proportion of area of growing cereal
wetted surface area [= area of wetted surface]
a geographical area of command
a mountainous area of western Qinling
abandoned area of mining
abrupt changes in the cross-sectional area of a tu
abrupt changes in the cross-sectional area of a tunnel
absorption area of root system
abundant and coarse sediment area of north Shaanxi
Active area of strong earthquake
Adjacent area of mining area
adjacent area of Shanxi Gansu Ningxia
adjacent sea area of Changjiang Estuary
adjacent sea area of Changjiang River Eastuary
adjacent sea area of Changjiang River Estuary
Advantageous Area of Ore Prospecting