The encapsulating polymers used in electronic packaging are characteristic of high porosity,which makes the material susceptible to tile moisture absorption.
研究SMT回流焊工艺中,温度、潮湿和蒸汽压力耦合作用对PBGA器件开裂失效的影响。
Therefore, it will meet the demands of avoiding the frozen injuries to pavement caused from the appearance of moisture and over-moisture in junior geologic zone, and will guarantee the strength and stability of the pavement.
重点介绍季冻区不良地质地带路基路面综合设计优化方案,该方案把路基路面视为整体结构进行综合设计,解决季冻区不良地质地带路基处于潮湿或过湿类型的冻胀病害,确保路基强度和稳定性,使路面不产生早期破坏。
In order to know the resistance of phage to external environment,suspension and carrier quantitative test methods were used to observe the resistance of F_2 phage,T_4 phage and T_7 phage in dry environment and wet environment and to compare parallelly with poliovirus.
为了解噬菌体对外环境的抵抗力,采用悬液和载体定量试验方法,对F2噬菌体、T4噬菌体和T7噬菌体在干燥环境和潮湿环境中的抗力进行了观察,并与脊髓灰质炎病毒作平行比较。
The electrical conductivity and electro-thermal temperature rise of carbon fiber reinforced cement mortar under dry and wet conditions were studied separately.
研究了碳纤维水泥砂浆在干燥和潮湿状态下的电导率和电热温升。
In low temperature and humidity of actual circumstance, we do some research about using dissimilar resin.
考虑到实际施工会遇到潮湿、低温的环境，通过改变固化体系、改变环氧树脂体系的方法进行了一系列实验，确定了特殊条件下CFRP加固混凝土用粘结材料的基本组成。
Because the humidity is a big problem in the underground space, this paper aims to solve the humidity problem in underground space through investigating and measuring the ventilation of underground space.
本论文针对地下建筑内部热湿环境存在的主要问题潮湿,通过对现有地下建筑内部热湿环境的调研和对长通道式地下建筑通风现场实测相结合的方式进行研究。