钢瓶是中空的管道,封闭的底部是凹入的,这样可以直立起来.A cylinder a hollow tube a closed concave base that permits the cylinder to stand upright.水平过渡交叉挡板应扣住, 凹入并隐藏.Horizontal intermediate cross rails, which are required for locks, will be recessed...

那种金属同酸接触后是否会起凹点?Does that metal pit after contact with acid?...

“凹眼”的英语可以翻译为：celophthalmia，coelophthalmia ...

“杯状凹”的英语可以翻译为：cupule ...

“内凹”的英语可以翻译为：indent ...

“凹坑”的英语可以翻译为：pit，[冶] steel pit ...

“凹凸板”的英语可以翻译为：uckplate，buckle plate ...

“凹边的”的英语可以翻译为：cissoid，cissoidal ...