| 摘要 |
An apparatus (100) for moving a tubular member (112) along a central axis (129) comprises a housing body (108) having a bore (110) running therethrough. A gripping member (146) slidably received in the bore defines a central opening for slidably receiving the tubular member (112). The gripping member (146) is movable between a first position to engage the tubular member and a second position to permit passage of the tubular member through the central opening. A mechanical device (126, 128) coupled to the housing body moves the housing body along the central axis.
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