pebble coal

英美

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- 砾煤,球状煤
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

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