屈服带随出砂量的增加沿井径向外扩张。
Yield front propagates away from the wellbore with the process of sand production.
文中用带屈服应力的假塑性流体描述驱替液性质，用宾汉流体描述原油性质。
The displacing fluid of power law fluid with yield stress and displaced fluid of Bingham are used to illustrate these effects.
扁平绕带高压容器的屈服压力和爆破压力，至今尚无较完整的理论计算公式。
Up. to the present, there are not complete theoretical formulas for calculating yield pressure and burst pressure for high pressure vessels with a thin inner core and wound flat steel ribbons.
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