crater
特殊用法adventive crater1.■寄生火山口arc crater1.■电弧陷口bowl crater1.■【天】碗形环形山contiguous crater1.■【天】相接环形山drip crater1.■锡滴坑(浮法玻璃缺陷)explosion crater1.■爆裂火山口lunar crater1.■(月面)环形山meteorite crater1.■陨石坑; 陨星坑rill crater1.■【天】沟纹环形山saucer crater1.■【天】碟形环形山settlement crater1.■沉陷坑weld crater1.■熔池