a精品视频_日韩欧美在线视频一区二区三区_www色网_日本一卡2卡三卡4卡免费网站_欧美韩日一区_国产一级精品绿帽视频_日本欧美在线_精品一区二区三区网站_视频一二三区_欧美一级无毛_国产精品久久久久久爽爽爽_韩国av免费观看_欧美老熟妇乱大交xxxxx_国产成人高清啪免费观看软件_日韩欧美亚洲中文乱码_√8天堂资源地址中文在线_求个毛片网站_黄色网址网站_国产成人午夜不卡在线视频_中文字幕在线无码一区二区三区

零件，配件; 精選例句 高考 1、 Here we distinguish azimuthal and equatorial mountings as well as fixed and transportable instruments. 比如說(shuō)有地平式和赤道式裝置,有固定式和移動(dòng)式的等等. 來(lái)源:辭典例句 2、 Since the unit doesn't vibrate, heavy foundations and isolation mountings are not required. 應(yīng)為設(shè)備不需要振動(dòng), 隨意不需要堅(jiān)實(shí)厚重的地基. 來(lái)源:互聯(lián)網(wǎng)