a walking beam的用法和样例：
- Based on a walking beam reheating furnace, mathematical models of slab and hot skid were built in this paper.
- The heat flux to slab surface of a walking beam reheating furnace along length of the furnace is computed, and total heat exchange factor is also calculated.
- A mathematical model for numerically simulating the temperature distribution of steel slab in a walking beam type reheating furnace is established by using the finite difference method.
- The poor old man was just a walking corpse.
- She's a walking textbook of medicine.
- She is, as it were, a walking dictionary.