Everyone is born with a P. F. O., but in most individuals it closes shortly after birth.
所有人生来都会带有卵圆孔未闭,但是绝大多数人会在出生之后很快闭合卵圆孔。
2
The process template represents the reusable class of process parts described by PF method.
过程模板代表由P- F方法描述的部分过程的可复用类。
3
By means of the bin, a comparative test of tractive performance between the wedged paddle wheels and nonrim ones ofpaddy-field tractor(P. F. T. ) is analysed.