Sheet Metal , Metalworking Guillotine , Shear, Bend Shear , New , Used, Machinery Sheet Metal.采购产品金属板材, 金属加工(剪切, 弯曲)机械钣金.It is introduced the classification, composition and properties of metalworking fluids.介绍了金属加工液的分类,...
The relationship of Bdellovibrio and microbiological pollution was observed in laboratory.本文在实验室条件下动态观察了蛭弧菌含量与微生物污染的相互关系.For determining potency and residues by microbiological assay technique . Especially for Lincomycin...
He economized by using trams instead of taking a taxi every time he went to school.他上学搭电车而不坐出租汽车,以节省钱.He economized by using buses instead of taking taxis.他不坐出租车而改乘公共汽车以节省钱.He economized by using trams instead of taking ...
鼻出血则约占10%.Epistaxis occurs in about 10 per cent.目的: 探讨鼻出血的原因 、 部位及有效治疗方法.Objectiye: To explore the causes, locations and effective treatment of nosebleed.目的探讨选择性颈外动脉栓塞治疗鼻出血的方法、疗效及并发症.Objective To evaluate the selective e...