One metre of fabric is sufficient to cover the exterior of an 18-in-diameter hatbox...一米布足以包裹住直径为 18 英寸的帽盒。Then the fiber collimator is used to acquire parallel beam with appropriate diameter.单模光纤后接光纤准直器能得到我们所需要的合适光斑直径的平...
It is possible to devise corresponding systematic procedures for rigid jointed frames.推导出适合于钢架的类似步骤也是可能的.Derivatives of bromine are much more active than the corresponding one of chlorine.溴的衍生物的活性要比相应的氯的衍生物大得多.Just like ...