On the basis of the formula of critical velocity of flow and the formula ( 11 ) the principle to design a vibratory pipe and to improve the sensibility and stability of instrument are discussed .

最后根据临界流速v。的公式和考虑流速影响的含沙量公式，讨论了 振动管的设计原则，俾有助于提高 振动管 式含沙量的测量 精度和稳定性。