shal

The present condition of the domestic and international electronic commerce in shal - low argument and development

浅议国内外电子商务的现状与发展

I shal hope to hear from you again soon .

我希望小久能再次收到你的信。

A kind of modified urea-formaldehyde resin sealing agent for sealing leak points of casing pipe in shal - low layer was prepared using urea-formaldehyde resin as main material and adding polyacrylamide .

以脲醛树脂为主剂，加入聚丙烯酰胺，研制了一种改性脲醛树脂堵漏剂，用于封堵浅层套管漏失。

Higher order horizontal derivatives of Bouguer gravity anomaly have advantages in highlighting shal - lower geologic bodies , suppressing regional deeper geological factors and distinguishing anomalies that are caused by adjacent geological bodies .

其目的是发挥布格重力异常的高阶水平导数的优势，突出浅部地质体的重力场特征，压制区域性深部地质体的重力场，区分相邻地质体引起的叠加异常。