ResultsBased on the classification of appraising criterion on acute toxicity test via mouth,skin and inbreathe with Wistar rat,LDS belonged to a feeb...

结论LDS对哺乳动物毒性属微毒级,是一种药。

LDS panels are formed to a unique shape and applied to concrete barriers and metal guardrails providing retroreflection across a wide range of entrance and observation angles.

持续、线形轮廓标通过勾勒道路轮廓改变来提高道路性。