... .XXQ-2005.XXQ2505.XXQ-3005,XXQ-3205,XXQ-3505 suitable for thin iron,aluminum,rubber and other materials testing, may be ... -2005,XXH-2505,XXH-3005,XXH-3205,XXH-3505 suitable for small-diameter weld inspection.install advance wheel or pipe crawler ... for easy insertion pipe (the controller can also enter the pipeline, ...