过去,节流器曾是液压中不受重视的角色;它被设计师忽视,觉得它只不过是板上的一个孔;但却使生产工程师担心,因为它往往是卷入过多的制造时间与制造费用的实际问题。指望一个简单钻出的节流孔的进口与出口条件、表面光洁度及直径都能得到足够严格的控制以给出一致的结果是一个渺茫的希望,但根据这项虚假的前提来估计费用的场 In the past, the throttle was once a neglected part of the hydraulic system; it was ignored by the designers and thought it was just a hole in the board; it worried the production engineer, however, because it was often involved in excessive manufacturing time Practical problems with manufacturing costs. Expecting a simple drilled orifice for inlet and outlet conditions, the surface finish and diameter to be rigorously controlled to give a consistent result is a slim hope, but based on this false premise to estimate the cost of the field