Warning: file_put_contents(/home/www/wwwroot/zidian/69228.com/cache/ff32f5e22af7cce7a149094e3762a72b.txt): failed to open stream: No space left on device in /home/www/wwwroot/zidian/69228.com/index.php on line 55 亚洲日韩乱码人人爽人人澡人,国产午夜无码精品电影在线观看
MPS stands for Managed Particle Size and is a novel convention in slip design, eliminating large slip components and reducing the risk of sticking a drill out BHA. MPS指的是顆粒尺寸控制技術(shù)，是一種全新的卡瓦設(shè)計(jì)創(chuàng)新技術(shù)，省去了大尺寸的卡瓦部件，能夠降低橋塞磨銑過(guò)程中的卡阻風(fēng)險(xiǎn)。