少妇呻吟白浆高潮啪啪69-少妇熟女视频一区二区三区-少妇熟女天堂网av-少妇爽滑高潮几次-少妇私密会所按摩到高潮呻吟-少妇太爽了在线观看免费视频

Adopting the principle of countercurrent cooling, the particles are cooled sufficiently and evenly

Adopting a unique vibrating discharge mechanism for discharge, the discharge is uniform and free of residue

The temperature of the cooled particles should not be higher than 3-5 degrees Celsius at room temperature

Unique arc-shaped cooling chamber with no cooling dead corners