water drum的用法和样例：
例句
- Thisis a set of six rations consisting of a biscuit substitute, algae hard tack,algae crackers, coffee bag, coffee can, and water packet.
这是一套六包的口粮组成的饼乾代替，藻类硬钉，藻类饼乾，咖啡袋，咖啡可以和水包。 - In the experiment, with the increase of water cut, the frictional pressure drops decrease sharply when water disperses in oil but hardly change when oil disperses in water.
本实验范围内，当管内液相处于油包水时，摩擦压降随含水率的增大急剧减小，当液相处于水包油时，随着含水率的增大，流动摩擦压降随含水率的增大变化平缓。
