The reverse of the outer tube is marked for improved orientation in the operative site.

外部套管上的反正位置标志,可以改善在手术部位的定位.

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The propeller shaft may be solid or hollow, protected by an outer tube or exposed.

传动轴可以是实心的或空心的, 由套管加以保护或裸露在外.

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Minimum clogging thanks to the redesigned opening at the end of outer tube.

套管头端开口的全新设计,能减少阻塞.

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