Objective To explore the effect and survival time by setting covered metallic expansible-self stents to treat postradiation esophago-tracheal fistula.

探索放置金属带膜自膨式支架治疗放疗后食管气管瘘功存时间。

It is shown that expansible ettringite forms in the topochemical reaction,and crystallizes in-situ on the surface of unhydrated aluminate minerals and orients radially.

发现够产膨胀石是由局部化学反应所成；它们在未水化铝酸盐矿物表面原地结晶，呈放射状长。