couplings的例句（couplings在句子中的用法）

• Hoses - Three 6 foot color - coded hoses with female threaded swivel couplings. 三条6英尺长彩色软管,带内螺纹旋转接头.
• John Crane : fitting and maintenance instructions of high performance couplings. JohnCrane: 高性能联轴器的配件及维护说明.
• Sincflex is the earliest manufacturer in making membrane couplings in China. 97年申克公司收到英国米切尔机械学会邀请参加膜片联轴器研讨会.
• ...sexual couplings. 性交