stuffing box nut填料函: stuffing box; gland box螺母: nut source; origin; parent填料函螺母挡: stuffing box nut catch填料函压盖螺帽 填密函盖螺母: packingglandnut舱壁填料函: bulkhead stuffing box下载手机词典可随时随地查词查翻译
