The bottle should not be allowed to touch the bottom in the sampling to avoid stirring up the sediment. 為了避免在采樣過(guò)程中攪起沉積物質(zhì)，瓶子不得接觸水底。
ASM can modify sampling intervals in time according to the variations of signal frequency in every signal cycle and finish a sampling process in a signal cycle. 近似同步法根據信號頻率的變化實(shí)時(shí)地調整采樣間隔，并且只需一個(gè)信號周期就可完成一次采樣過(guò)程。
We consider that equal-ratio sampling method is suitable for the successive and unsteady emitting status of waste water. 并認為等比例采樣法是連續不穩定排放方式比較適合的采樣方法。
The distribution of particle concentration in the cyclone tube was measured by isokinetic sampling method. 采用等動(dòng)采樣方法對旋風(fēng)管內的顆粒濃度分布進(jìn)行了系統測量。
