an expansible antenna.
折叠式
an expansible antenna.
折叠式
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.
现能够产生膨胀钙矾石是由局部化学反应所生成;它们在未水化铝酸盐矿物表面原地结晶,呈放射生长。
Objective To explore the effect and survival time by setting covered metallic expansible-self stents to treat postradiation esophago-tracheal fistula.
目:探索放置金属带膜自膨式支架治疗放疗后食气瘘功效及生存时间。
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