The crust on the snow was thick enough for us to walk on it.

冻结的雪面够厚, 我们可以在上面走。

In this paper, the mathematical model of the reltion between water saturation vapor pressure and saturated temperature is established in the form of monoacidic polynomials.

提出一元多项式形式的水蒸气饱和压力与饱和温度关系的数学模型，牛肉冻结过程的计算机模，在此基础上牛肉冻结过程中干耗量的数值计算。

Suitable parameters of perimeter blasting were obtained with good results.In the final, the paper discussed the blasting mechanism of the frozen soil and the blastin...

通过试验获得较好效果下周边爆破的适宜参数,并对冻土的爆破机理和爆破对冻结管的影响问题探讨。