ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

An experimental apparatus was designed to analyze the mechanics parameter of shovel and excavationof the lunar soil. The test bed was consisted of two parts: shovel device and excavating device, which could realize linear shovel movement and rotational excavating movement. The shovel test with this experimental apparatus proved that shovel speed had very little effect on the force of shovel while different compaction status of lunar soil and angle of shovel affected a lot of force of shovel. In the excavation experiment, with the increasing of revolving speed, the peak torque would also increase. The experiment initially confirmed the parameters of properties of soil mechanics of sampling machine on the surface layer. It could supply significant reference to the study of mechanical property of the interactions between the sampler and lunar soil.