A reference material for calibrating and verifying the calorimeter of propellant explosion heat is composed of nitrocellulose(NC),nitroglycerine(NG),centralite and vaseline.

采硝化棉、硝化甘油、中剂和凡士林为火药爆热热量计标准物质的组成成分,通过生产工艺优化制备出标准物质。

ABSTRACT Objective： To establish a method for determining the content of josamycin by HPLC and compare it with the microbial assay.

摘 要 目的：建立HPLC法测交沙霉素含量的法与微生物法结果相比较。

A system of verifying anemoscope in tobacco specific smoking machine was designal.The theory and component parts of this system was introduced and the method of velocity at a fixed point was modified.

本文简述了烟草专吸烟机风速仪的装置———多普勒激光流速测速系统的组成及工作原理,介绍了位点风速的测量修正法。