A better gauge of an economy's use of resources is "total factor productivity" (TFP), which tries to assess the efficiency with which both capital and Labour are used.
Relation among feeding roving gauge, twist factor and yarn property were researched, property of polyacrylonitrile preliminary heat treatment in oxidizing polyester filament core-spun yarn was tested.
研究了喂入粗纱间距、捻系数与成纱性能的关系，测试分析了聚丙烯腈预氧化纤维涤纶长丝包芯纱的性能。
3
The physical phenomena concerning with the gauge field are most completely and exactly described by non-integrable phase factor.