fossn.沟；渠道；护城河=fosse.fossula post fenestram[医] 窗后小窝Foss' intestinal clamp复原fossula of oval window前庭窗小窝fossula of round window蜗窗小窝fossula of cochlear window蜗窗小窝fossula retrocommissuralis[医] 连合后小窝fossula fenestrae cochleae[医] 蜗窗小窝FOSS Launch and Tug Company西雅图内河拖轮公司fossula of petrous ganglion岩小窝fossula fenestrae vestibuli前庭窗小窝