流体与固体壁间的换热 Convection heat transfer
壁橱的空间 closet space
井壁与钻头的间隙 bit clearance
井壁与钻具间的间隙 wall clearance
悬崖峭壁之间的峡谷 a gorge between precipices
枪眼与枪眼之间的墙壁 merlon
这样推杆与炉体前壁间的摩擦力更小，推杆在通过炉体前壁时非常灵活。
Therefore, friction between the push rod and the furnace body front wall is less and the push rod is very flexible when running through the furnace body front wall.
再次老旧车可以适当选用黏度稍大点的机油来增加活塞、缸壁间的密封性。
Again the old car you can choose appropriate viscosity of older oil to increase the sealing performance of the piston and cylinder wall between.
钢罐和岩洞壁间的距离很小并灌注混凝土，这样钢罐壁不承受任何应力而由岩石和混凝土承受。
The space between the rock walls and the steel tank was narrowed and filled with concrete so that all the stresses would be absorbed by the concrete and rock as opposed to the steel tank shell.
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