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

In order to deal with the problems in axial piston pump such as uneven loading of port plate pair, offset load moment of port plate and bad lubrication of port plate pair in low pressure area, textured port plate in low pressure area was studied. An analysis model was established to study the effects of diameter, depth and area ratio of micro-dimple on load carrying capacity and compensating torque. The results showed that the micro-dimples with greater dimple diameter could induce higher load carrying capacity and compensation torque. The optimum dimple area ratio was in the range of 12%~18% and the dimple depth gave an obvious affection on load carrying capacity and compensation torque.