Avoid using roller pens . a roller pen does not write well when you are lying down with the pen pointing upwards . keep the duration of each observational interval at one hour 所用的筆最好不要用圓珠筆,因躺下向上書(shū)寫(xiě)時(shí),墨水流不出來(lái),而需要轉(zhuǎn)身往下寫(xiě)便費(fèi)時(shí)失事了。
Weighing about five tons each , they were probably transported over the land to the sea using rollers , then floated on simple boats along the coast round to southern england 每個(gè)石塊約重五公噸,可能是利用滾輪把它們從陸上移到海上,然后再用簡(jiǎn)單的小船載著石塊沿著海岸一路漂移到英格蘭南部。
Use roller to roll one of end of tape in order to adhere to tescified load on lower end . measure the distance of slide after a certain time . if drop it is time to evaluate tape ' s retention 將膠帶之一端以滾輪輾壓,使之粘于試驗(yàn)板,一端懸吊規(guī)定之重量,經(jīng)一定之時(shí)間后,量測(cè)膠帶下滑之距離,如中途掉落,則記錄時(shí)間,用以評(píng)定膠著保持力
A new type of double - acting contactless sliding - vane pump was put forward to the defect analyzed on sliding - vane , which uses roller to control the locus of sliding vane to insure the minute gap between the stator and sliding vane 摘要通過(guò)分析滑片泵存在的缺陷,提出了一種利用滾柱控制滑片運(yùn)動(dòng)軌跡,使滑片與定子內(nèi)表面保持微小間隙的新型雙作用無(wú)接觸滑片泵。
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