Medical bubbles, and especially the opened vial is very fragile, and spill their contents sometimes very simple. To avoid this, use a “tortilla” of clay: recessed in her glass bottoms of tanks holding up, as if glued.
V. GOLOVASHIN, Rybnoe, Ryazan region.
Recommend to read
Overrunning Clutches Instead of a Differential
The need to have a nimble and reliable motorized assistant at my personal disposal I (like, probably, many others in a similar situation) felt with particular acuteness when I became the...
ARMORED RECONNAISSANCE WEHRMACHT
the First German armored vehicle, created in the 1930-ies, was developed by order of the Supreme command of the Reichswehr on the chassis of the car Adler 3Gd. This rather primitive...