Which one has the largest machining range and highest precision for deep hole honing machine? Imported domestic are recommended

Currently do large deep hole honing machine this piece to do the best is the import of good energy, they HT series of parameters is the aperture range: 20-1000mm, the maximum length: 16m Accuracy: processing length of 10m diameter 1m parts, straightness up to 0.01mm/m, roundness up to 0.015mm, roughness up to Ra0.1. Domestic domestic domestic really do count on the Large deep hole honing machine on so many, Suzhou Xinneng, Yichang Li Rui Te, Shanghai Hong Ning three is the technology is considered to be more over the top, the domestic to do small special more, large basically most of the internal grinding machine with no difference, or is modified grinding machine technology, the real design research and development or imitation of the good to be able to do so a few, the Shanghai Hong Ning's parameters: Processing range Hole: standard machine tool machining range of φ25- 450 mm, special design up to φ1000mm Honing processing range φ25-1000mm, length: series configuration, standard 2m, 3m, 4m, special design up to 10m. precision in the 4 silk upwards, Xinneng's I heard as if the design of the feed system is not very ideal, a friend used to use to pull out of the situation when there is scratching the workpiece, the manufacturer said that it is the problem of the honing oil, change a lot of oil is not solved. A lot of oil is not solved. Yichang Liruit is a seniority is not very deep manufacturers, their technology seems to be good, a lot of new technology is very convenient, automatic stroke repair, automatic detection, graphic display of the inner wall of the high and low degrees, the parameters seem to be the longest can be done to 15 meters, aperture up to 1.2 meters, precision H6-H8, 1 silk this way, I heard that the efficiency of honing than the average honing machine is higher than 1.5 times more. All of the above can be used as a reference, the specific certainly have to go to the exhibition to see the equipment, or the user side to see, take a few tube honing to know.