Dilute solutions of a simple, coil-like polymer in a volatile solvent are cast on a glass slide in the presence of moist air flowing across the surface.
简单的无规线团状态聚合物溶解在挥发性的溶剂配置成稀溶液，在有潮湿空气在表面流动时浇铸到玻璃片上。
A Helmholtz coil is installed on the base sliding block through the coil fixed plate and can slide freely on the base guide rail.
亥姆霍兹线圈通过线圈固定板安装在底座滑块上，可以自由的在底座导轨上滑动。
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