Compared with the existing schemes, the proposed scheme can rekey real-time, provide a high level of security and reduce communication overhead at the same time.
It is equipped with asphalt return tube, anti-puffing pressure vent valve, anti-aging overhead nitrogen valve, thermometer, volumeter and output asphalt rapid discharge valve and coupling.
Air hole, burnthrough, cooapse and welding crackle occurred in the fixed overhead weld for aluminium and aluminium alloy tubes, above all the small-size thin wall tube.
Whether grey or blue skies lay overhead, the heft of the waves was always huge – sometimes rhythmic and pleasant, at others offering a waltzer of a voyage.