Warning: file_put_contents(): Only 0 of 5070 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/52065.com/index.php on line 55 duct pilot例句_duct pilot英汉例句_duct pilot双解例句_伍贰汉英词典
Air flow measurement of utility boilers is often liken by using venturi duct, latticed wing, multiple pilot tube and double venturi tube. 电站锅炉的通风量，主要用风道型文丘里、机翼、笛型管及双文丘里进行测量。