The structure and properties of flatsection and circular polyester filament were studied through measuring birefringence, sonic modulus and work coefficient ect.
对扁平形聚酯纤维和圆形聚酯纤维的结构和性能进行了研究。
2
Effect coefficients of the response spectra flatsection values of three kinds of soil layer constructions were found by comparing the average values with those of the normal profiles.
通过与正常剖面的反应谱平台值比较，给出了三种土层结构的反应谱平台值的影响系数。
3
Under the condition of a minor space, the utility model enables a flatsection workpiece with a light section to change from horizontality into erectility under the function of screws (3).