When refuelling, drivers must complete an automatic docking procedure between nozzle and tank. Both pump and car then begin a digitally choreographed check for leaks.
Spray nozzles installed in the shelf, check whether the nozzle rotating flexible arm started to see the suitability of its elastic, add the site in the rotation amount of oil.
把喷头安装在喷架上，检查喷头转动是否灵活，拉开摇臂看其松紧是否合适，在转动部位加注适量机油。
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As for disadvantages, it requires a special nozzle and check ring to accommodate material coming back into the injection unit.