Through comparison of the speed variance of spindles Novibra and the conventional spindles on the frames K44,frames of compact spinning and conventional spindles of ring spinning,conclusion is made that little is done to cotton yarn,especially the fuzzy yarn and neps using spindles Novibra in hi-speed condition,hence the advantages of the same in hi-speed operation.

The plantation comparison trial was carried out between seeds in Eucalyptus grandis seed orchard and general seeds in Fujian Yong\'an National Forest Farm,the results suggested that the growth of trees generated from seed orchards were obviously better than that of the general seeds.