... type标准多风机型:FBLD-300,400,500,600,750 3. Standard low noised type标准低噪声型:FBLS-50, 75,100,150,200, ... 300,400,500,600,750 4. Standard low noised multi-fan type标准低噪声多风机型:FBLSD-300,400,500,600 ... ,750 5. Standard super low noised type标准超低噪声:FBLSS-50, 75,100,150,200 ... ,300,400,500 6. Standard super low noised multi-fan type超低噪声多风机型:FBLSSD-300,400,500,600 ...