没有烤箱，我做了一些有盖的方形罐子，在上面撒上热灰。
Not having an oven, I made some square pots with lids and covered them with hot ashes.
量一下这个正方形，然后告诉我需要用多少材料才能盖过它。
Measure this square and tell me how much material is needed to cover it.
本文阐述了长方形网格网架在单层工业厂房屋盖中的合理应用。
This paper expounds the reasonable application of the space trusses with rectangular latticework on the roof of single-storey factory building.
应用推荐