单词	casing head
释义	casing head 采油树
随便看	biological pharmaceutical waste water biological pharmacology biological pharmacy biological phase biological phenomena Biological Phenomena Biological phenotype biological philosophy biological phosphate reduction biological phosphate removal biological phosphorous removal biological phosphorus and nitrogen removal biological phosphorus removal Biological Photographic Association biological photography biological photometry biological photomicroscope biological/physical ratio biological physicochemistry biological physics biological physiology biological plagiarism biological planning biological plant geography biological plastics