日本在线国产视频._在线高清免费爱做网_婷婷五月丁香加勒比在线_中文A∨字幕网站_亚洲码欧洲码精品_黑人和黑人一级毛片_一本综合狼友精彩视频_激情欧美成人免费观看_欧美激情做真爱牲交视频_中文字幕日韩熟女

Applicable scope:

Suitable for environments where gravity flow drainage is not possible or the drainage point is too far from the horizontal distance of the drainage riser. Suitable for subway stations, underground shopping malls, parking lots, etc

Features:

Double crushing to avoid blockage

Built in water pump, with strong practicality

Integrated design, efficient collaboration

Dual pump alternation, mutual backup

Safe and efficient, intelligent operation