Cut the two φ20cm threading tube, take-up motor line w5210, take-up limit switch line w5212 penetration of the two tubes, penetration from a machine outside foot hole w5210, w5212 close to the fuselage at the machine feet hole through.

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Cut two pieces of 20cm stuffing tube, motor cable coiling W5210, coiling limit switch wire W5212 into two tubes, W5210 penetration from the holes on the outside of the foot, W5212 hole through from the foot close to the fuselage.

Cuts two section of φ20cm threading tubes, holds and opens a book takes electricity equipment and lines W5210, the volume takes spacing switching line W5212 to penetrate two sections of pipes separately, W5210 penetrates from in the undercarriage flank hole, W5212 in the hole which places from the u