The effect is of the cow raising its head 13 as it moos. The toy cow can be pulled along on wheels 12 by use of the bulb 28. A two-lobed cam 41, Figs 1, 2, on the rear axle 42, engages a loop 40 on a rod 39 so that the latter is twisted back-and-forth as the axle ...
Zinc also plays a crucial role in vital functions in the body; however, it also poses a threat to human health when exposed in high amounts, especially to gastrointestinal, reproductive, and excretion systems (Agnew & Slesinger2020; Materna & Nieradko-Iwanicka2020). It was obtained that the ...