Examine the area that is around the drain holes for signs of corrosion.
A.检査排水孔周围区域是否有腐蚀迹象。 B.检査进气孔旁边区域是否有磨损迹象。 C.检查进水孔前面区域是否有开裂迹象。正确答案A
Examine the area that is around the drain holes for signs of corrosion.
A.检査排水孔周围区域是否有腐蚀迹象。 B.检査进气孔旁边区域是否有磨损迹象。 C.检查进水孔前面区域是否有开裂迹象。正确答案A