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Ammunition,ng applications. An individual unit of ammunition is called a .. Biological weapons (those which project, disperse, or disseminate biological agents) were banned by the . of 1925 (COTB). The . (COTC) outlaws the use of chemical weapons. Ammunition may be categorized by its means of delivery:磨碎 发表于 2025-3-24 08:27:45
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Antifreeze,xcess heat. Disadvantageously, it promotes corrosion and its operating range is curbed by its freezing point of 0°C and boiling point of 100°C, temperatures easily reached in winter conditions or in hot machinery, like internal combustion engines. To abate this problem, chemical . are added which de苦涩 发表于 2025-3-24 15:30:03
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Asbestos,erpentine and amphiboles) that separate into fibres on mechanical processing. While the exact taxonomy continues to evolve, the sole serpentine variety is called . (12001-29-5) while the amphiboles include five forms:Malaise 发表于 2025-3-24 23:57:12
Bituminous Products, in which hydrocarbon mixtures have lost their volatile components leaving a denser residue. Natural bitumens come from exposed and weathered petroleum and rock deposits. Synthetic bitumens come from the residue remaining after the distillation of petroleum, coal tar, and other organic materials lik