recessed

1.The napalm rolled over and down the front of the recessed embrasure.

那一发凝固汽油弹滚落到了嵌枪眼前方。

2.The most common, the plate-and-frame press, contains caulked , metal septa and a recessed cake space.

最普遍是板框过滤机，有可填充、金属隔片和凹显空间滤饼。