Finger tighten the column nut until it starts to grab the column, and then tighten the nut an additional 1/4 to 1/2 turn so that the column can't be pulled from the fitting when gentle pressure is applied.

用手?jǐn)Q緊柱螺母直至其開始夾住柱子色就操在线视频。再擰1/4-1/2圈，這樣輕輕拉動時，柱子不會脫出來。8欧美日韩一卡。

The factors included the type of extractant, the amount and the extraction times, the type of purified column, the type and dosage of eluviatant about the pre-treatment of the samples. The extraction was 3 minutes (13500rpm) of high speed homogenize extraction. 50mL acetonitrile as an extractant was acted on one time extraction. The florin silicon column was taken as the purified column. The extraction was eluted by 30ml 3:2 acetone - hexane and concentrated by nitrogen blowing under 50 °C water bath.The chromatographic separated conditions were studied applied the Agilent 6890 gas chromatographic apparatus and DB-17 capillary column(30m×0.25mm×0.25μm).

研究了提取劑種類、用量與提取次數(shù)中文字字幕人妻中文，凈化柱種類超碰0视，淋洗劑種類與用量，提取方式與提取時間视色网站视色视频，柱溫和柱流量等因素對油菜籽中有機(jī)磷農(nóng)藥殘留提取、分離凈化和色譜分離的影響91插进去，建立了采用高速勻漿提取方式提取3min13500rpm.min~(-1深夜免费看，以50mL乙腈為提取劑一次提取，以弗羅里硅柱為樣品液凈化柱欧美国产黄色A片大全，以30mL 3：2丙酮-正己烷為淋洗劑swag观看，在50℃水浴條件下用氮吹濃縮，氣相色譜檢測的油菜籽有機(jī)磷農(nóng)藥多種殘留檢測技術(shù)国产黄色专区。

When H-shape is widely applied in the framed column, there is no rule for design of column flange backing in the case that the thickness of the end plate, which is given by the tension of the bolt, is larger than the thickness of the column flange which the beam is connected to, while the column section can not be changed.

在H型鋼普遍應(yīng)用于框架柱時91久久人人，當(dāng)根據(jù)螺栓所承受的拉力計算出的梁端板厚度比與其連接的柱翼緣部分的厚度大時，且無法更改柱截面的情況下日皮欧美，柱翼緣部分的補(bǔ)強(qiáng)設(shè)計無據(jù)可依国产特黄特色A级在线视。