料仓中出现的不流动一般是由于架桥或出现空洞（鼠洞）。
No-flow from a silo is typically due to either arching (bridging) or rat-holing.
（死猫洞）指汽车轮胎上部与车体之间的空隙，也就是汽车轮胎和轮仓之间的那个空隙。
Dead-cat hole refers to the space between the top of a car tire and the body of the car, in other words, the space between a car's tire and the wheel well.
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