An alternative method was to use a large shallow receptacle rather than a cauldron; oil, tallow or pitch then being poured in.
另一种方法是不用大锅，而是使用一个大的浅性容器，油，牛油或沥青随后被浇入。
2
A fluid level sensor comprises a parallel plate capacitor coupled to an integrated circuit located in the bottom of an oil pan or other receptacle in which fluid level is being sensed.