When the cavity of steam with fluid comes into high-pressure area, the steam in the cavity at once coagulates and vacuole crumbles and fall.

• 当蒸汽空穴随着液流进入高压区，空穴内的蒸汽顿时凝结，空泡溃灭，随之产生高压、高温、放电及发光现象。