?风动钻架
... 风动钻眼：air drilling 风动钻架：feed leg 风动推车机：pneumatic pusher ...
气腿式钻机
三足式延髓踢
The devices are used in a procedure called angioplasty, in which a balloon is snaked in through the leg and used to clear clogs in the arteries that feed the heart.
FORBES: Magazine Article
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