Warning: file_put_contents(/www/wwwroot/ppbbbu/5356789.com/cache/10ee37347ce9b1d5777f9d21c1228e58.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/5356789.com/index.php on line 55 weathered pebble例句_weathered pebble英汉例句_weathered pebble双解例句_零六五六深蓝词典
For the frozen weathered bedrock, sandy gravel and pebble bed, it is more suitable to use drilling and blasting method than to use the frozen soil excavator. 對凍結風化基巖、砂礫層或卵石層，凍土挖掘機傚率低，宜採用鑽眼爆破法，採用抓巖機裝載凍土。