pebble coal的相关资料：
临近单词
pebble
Pebbles ground on the beach
pebble bed reactor experiment
pebbles of radiolarian cherts
pebble-bed gascooled reactor
pebble-bed gas-cooled reactor
pebble-strewn deflation pavement
pebble contact biological oxidation
Pebble bed high temperature reactor
pebble modular high-temperature gas-cooled reactor