词汇	Pb-Zn material
释义	Pb-Zn material 铅锌物料
随便看	bureau of maritime transport administration Bureau of maritime transportation bureau of materials Bureau of Medical Devices bureau of medicine Bureau of Medicine and Surgery bureau of military service Bureau of mineral development supervision Bureau of Mineral Resources Bureau of Mineral ResourcesBMR bureau of mines bureau of mines method of coal analysis bureau of mines test bureau of mint bureau of motor carrier safety Bureau of Narcotics Bureau of Narcotics and Dangerous Drugs bureau of national capital airports bureau of national health insurance Bureau of Naval Personnel Bureau of Naval Personnel Manual bureau of naval personnel publications bureau of naval ships Bureau of Naval Weapons bureau of naval weapons instruction