The basic process of biological sewage treatment consists of the liquor either by bubbling air through it or by agitating the surface()
A number of biological sewage treatment plants are in use at sea but nearly all work on what is called the extended aeration processBasically the consists of oxygenating the liquor by bubbling air through itAccording to the above two sentences, the word "this" means ().
Disinfector in the sewage biological treatment plant usually is ()
What kind of mixture is the new treatment?
The basic process of biological sewage treatment consists of the liquor either by bubbling air through it or by agitating the surface()
The treatment of the fuel oils involves storage, heating, filtering and()
Which of the following is lest important than the other three in the first-time-treatment of cardiac arrest?
Most marine biological sewage treatment plants consist of all the following statements except ().
The most effective warming treatment for a crew member suffering from hypothermia is().
What is a treatment for traumatic shock?()