FIELD: sport.;SUBSTANCE: invention relates to sporting equipment, precisely to roller-skates. Each roller-skate contains a base in the form of quadrangular support pad for user's foot and rotating rollers placed under the pad and is equipped with a unit for blocking rollers if necessary to wal...
不锈钢填料精馏塔实验装置 型号:YC-JL/T-D功能:1、了解填料精馏塔实验装置的基本结构和工作原理;2、掌握填料精馏塔的操作方法;3、观察精馏时全回流和不同回流比下,对系统温度稳定性的影响;4、掌握精馏塔效率的测定方法。筛板精馏实验装置 型号:YC-JL-D功能:1、了解筛板精馏塔实验装置的基本结构和工作原理;2、掌...