“definite area”简单造句，definite area造句子

The mid-day bulletin had not mentioned any definite area.

Cylinders should be assigned a definite area of storage. The area should be dry, cool, well-ventilated, and preferably fire-resistant. Keep cylinders protected from excessive temperatures by storing them away from radiators or other sources of heat.

On the basis of analysing the experiments of atomized jet vacuum pump. it puts forward an empirical optimized working pressure formular for a definite area ratio in.