只要在钢索被堵塞物缠住无法持续疏通时才可运用反转功用，或者是在经过P形弯道时，可以恰当运用反转使钢索便利经过弯道。 。
As long as the wire is entangled unsustainable dredging obstruction can use rotary function, or after P shape curve, can be appropriate to use rotary make convenient wire through corners.
只要在钢索被堵塞物缠住无法持续疏通时才可运用反转功用，或者是在经过P形弯道时，可以恰当运用反转使钢索便利经过弯道。 。
As long as the wire is entangled unsustainable dredging obstruction can use rotary function, or after P shape curve, can be appropriate to use rotary make convenient wire through corners.
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