rounding bottom การใช้

This method involves freezing the protein solution on the walls of a round bottomed flask and sublimating the liquid in a vacuum .
Long neck round bottom flask
Laboratory glassware . round bottom flasks . flat bottom flasks . flasks with conical ground glass joint
Laboratory ware made from fused quartz and fused silica ; boiling flasks made from fused quartz ; round bottom flasks , flat bottom flasks and conical flasks
In accordance with archaeological discoveries of ba culture in three gorges region , and analyses about these material , some points on ba minority ' s living customs can be drawn that they lived in a good ecological environment ; their main tools in daily life are crockery , which is not only large in number but also is featured with round bottom ; they live on paddy rice , fish and other propagations ; salt plays an important role in their life ; the location of ba culture relics , namely waterside or mesa near waterside , reflects their habitation features and construction mode residing before rivers