但是，如果是大风吹倒了一棵树，穷人就可用那棵树作柴火了。
But, if the wind blew down a tree, a poor person could take the wood for fuel.
当用瓦作单位嫌太小时，我们可用千瓦。
Where the watt is too small a unit, we may use the kilowatt.
合用于作受力及承压件，也可用于一般用途的蒸汽、水、气体及空气管线。
For mechanical and pressure use, and also for transporting steam, water, gas and etc.
合用于作受力及承压件，也可用于一般用途的蒸汽、水、气体及空气管线。
For mechanical and pressure use, and also for transporting steam, water, gas and etc.
应用推荐