Laboratory glassware . solid - stem general purpose thermometers 实验室用玻璃器皿.一般用途实心杆式温度计
2.
A cut is usually used to illustrate the shape of a cutting plane of an object or the holes and grooves in the solid shaft 断面一般用于表达机件某一部分的切断的表面的形状,或轴及实心杆上孔、槽等的结构形状。