单词	球形闸门
释义	球形闸门 ball lock
随便看	around needle catheter aroundness Around noon Around noon,something suddenly tugs at the line Around north a round of applause A round of applause to signify approval a round of beef a round of calls a round of drinks a round of golf a round of parties a round of talks a round of toast a round of visits Around one hundred square feet around one million around opening around openings for welded attachments a round pace Around Par a round peg in a square hole a round plate around Poyan Lake around pylons eight