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    On Dec. 26^th, 2019, the fourth ASD tugboat, which is built for Liaoning Longyun Shunze and named “Bao Hang 6”, is sailing smoothly.
    The vessel has length of 38m, breadth of 10.8m, depth of 5.15m, power of 4420kw. It has capacity of pull ahead of 72.8t, pull astern of 65.6t, endurance of 700nm and speed of 13.5kn.