Rubber powered ones come in two types : those made from wood, and those of sealed tubing metal or composite and / or a combination of these materials construction : referred to as the Stock or Barrel respectively.
32.
P 4 O 6 is converted into the mixed P ( III ) P ( V ) species P 4 O 8 when heated in a sealed tube at 710 K, with the side product being red phosphorus.
33.
In about 1654 Ferdinando II de'Medici, Grand Duke of Tuscany ( 1610 1670 ), made sealed tubes part-filled with alcohol, with a bulb and stem; the first modern-style thermometer, dependent on the expansion of a liquid, and independent of air pressure.
34.
The product is either pre-measured by a multi-head weighing system or the sealed tube end is then lowered onto a precision weighing table and the product to be bagged is dispensed through the long conical tube in the center of the bag.
35.
These tests proved that the torpedo belt system of multiple Pugliese system of a large tube filled with smaller sealed tubes, but it was too late to incorporate these test results into the design as construction was well underway by the time they were completed in late 1939.
36.
A better neutron source is to use a sealed tube electrostatic D-T neutron generation tube, this has the advantage that the tritium is much less radiotoxic than the californium so in the event of an accident such as an explosion, the nuclear mine detection equipment would pose a smaller threat to humans.
