亚洲欧洲日产国码高潮αv_91精品亚洲日本午夜精品_国产青青色在线观看_国产三级免费精品_国产成年女人免费视频播放a_人妻少妇88久久中文_亚洲精品无码一级毛片_色欧美婬色视频在线播_亚洲精品国自产拍影院_国产5毛特效片直播

Model: DL-9

· The wooden wall leakage wedge is mainly composed of wooden wedges of various specifications, processed by softened white pine to make salt, soft texture and complete size. The plugging wedge is specially insulated to prevent cracking and deformation. Technical performance parameters

·Medium temperature: -70-100 °C

·Working pressure: -1.0-0.8MPa plugging