| |||
ratchel | |||
cobble | |||
pebbe (直径为2〜64mm(lΦ〜6Φ)的沉积颗粒) | |||
pebble gravel; pebble stone | |||
pebble | |||
medium gravel; boulderet; cobblestone | |||
boulderet (石); cobble gravel (石) |
中砾 : 50 phrases in 12 subjects |
Bridge construction | 5 |
Desert science | 8 |
Drilling | 2 |
Engineering geology | 2 |
General | 2 |
Geology | 2 |
Geophysics | 2 |
Hydroelectric power stations | 2 |
Oil / petroleum | 11 |
Soil science | 1 |
Technology | 12 |
Wind Energy | 1 |