data check

data level

digital level data communication

storage data check

Underground water level data

oil level check plug

routine level check

convesion of curved-surface data into borizontal-plane data

data processing for piecing together various 3 D data sets

ratio of test data to design data

seismic data transmission data

test data and the highest data

coupling mechanism between upper level and low level jet

fiscal system at county level and township level

interaction between upper level and lower level

municipal level and county level

“point” data

△-∑ data converter

0-1 Bernoulli data

0ff-line data processing