短語(yǔ)詞組短語(yǔ)bottom supporting platform 底層支持平臺(tái)bottom founded platform 底底式平臺(tái)bottom -dump platform 活底板吊框bottom sitting drilling platform 坐底式鑽井船sloping -bottom platform 斜坡平臺(tái)bottom supporting drilling platform 定柱沉墊式鑽井平臺(tái);坐底式鑽井平臺(tái)platform bottom 收割臺(tái)底板 返回 bottom platform