预衍 标准查询与下载

PN C97062-1968 煤衍生产品．衍生物．酸洗法

Przedmiot normy. Przedmiotem normy jest oznaczanie stopnia zabarwienia produktów w?glopo-chodnych z kwasem siarkowym - zwanego równie? stopniem

Coal deriva?ives Me?hods for ?he acid-wash ?es?

ITU-R P.526-11-2009 衍射传播

Propagation by diffraction

ITU-R P.526-2013 衍射传播

Propagation by diffraction

ITU-R P.526-4-1995 衍射传播

Propagation by Diffraction

ITU-R P.526-12-2012 衍射传播

This Recommendation presents several models to enable the reader to evaluate the effect of diffraction on the received field strength. The models

Propagation by diffraction

ITU-R P.526-5-1997 衍射传播

Propagation by Diffraction

ITU-R P.526-6-1999 衍射传播

Propagation by Diffraction

ITU-R P.526-2-1992 衍射传播

Propagation by Diffraction

ITU-R P.526-7-2001 衍射传播

Propagation by Diffraction

ITU-R P.526-14-2018 衍射传播

This Recommendation presents several models to enable the reader to evaluate the effect of diffraction on the received field strength. The models

Propagation by diffraction

ITU-R P.526-9-2005 衍射传播

Propagation by diffraction

ITU-R P.526-3-1994 衍射传播

Propagation by Diffraction

ITU-R P.526-15-2019 衍射传播

Propagation by diffraction

CSN 75 3418-1987 由石油和石油衍生品的公路运输引起的地表及地面水污染的预防

Schválení ST SEV 5181-85 doporu?ilo ministerstvo lesního a vodního hospodá?ství ?SR Zpracovatel a oborové a normaliza?ní st?edisko vodního hospod

Preventlon of surface and groud water contamination caused by road transport of oil and oil-derived products

JB/T 11144-2011 X射线衍射仪

本标准规定了X射线衍射仪的术语和定义、产品分类、技术要求、检验规则、测试方法、标志、包装运输、贮存等。 本标准适用于θ-θ、θ-2θ结构测角仪的多晶X射线衍射仪（以下简称衍射仪

X-ray diffractometer