【简答题】A particle stream has 33 weight percent particles with diameter 1μ, 33 percent with diameter 5μ, and 34 percent with diameter 10μ. We now pass thisstream through a cyclone whose efficiency is describe...
【单选题】The outside diameter of the pipe is _____ the diameter of the bore of the piston rod, the result being that an annular space formed between the piston rod and the pipe.