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Pelican的工程师们知道，他们需要考虑压差。0450 Mobile Tool Chest 会在世界各地周转，常常还会从飞机上扔下去。海拔的迅速变化会对密封造成压力，在它降落到地面的极短时间内，压力从大约 2 psi (140 mbar)骤升至近 16 psi (1,105 mbar)。

Gli ingegneri della Pelican sapevano che avrebbero dovuto gestire i differenziali di pressione. Le casse degli attrezzi 0450 Mobile Tool Chest avrebbero dovuto essere trasportate in tutto il mondo e spesso scaricate da un aereo. Nel breve intervallo di tempo necessario alle casse per toccare il suolo, i rapidi cambiamenti di altitudine possono causare un aumento della pressione sulle guarnizioni da circa 2 psi (140 mbar) a quasi 16 psi (1.105 mbar).

Les ingénieurs de Pelican savaient qu’ils devaient prendre en compte les différences de pression. La caisse à outils mobile 0450 serait transportée dans le monde entier et souvent livrée par avion. Les changements d’altitude rapides peuvent provoquer une hausse de la pression sur les joints allant de 2 psi (140 mbar) jusqu’à 16 psi (1,105 mbar) pendant le court délai lui permettant d’atteindre le sol.

Los ingenieros de Pelican sabían que debían compensar los diferenciales de presión. La caja de herramientas móvil 0450 iba a ser transportada por todo el mundo y a menudo lanzada desde un avión. Los rápidos cambios de altitud pueden hacer que la presión en las juntas aumente de 140 mbar (2 psi) hasta casi 1105 mbar (16 psi) en el poco tiempo que se tarda en aterrizar.

Den Ingenieuren von Pelican war klar, dass Druckunterschiede berücksichtigt werden müssen. Der Mobile Werkzeugkoffer 0450 ist dazu bestimmt, rund um den Globus transportiert und häufig aus einem Flugzeug abgeworfen zu werden. Sehr schnelle Höhenwechsel können den Druck auf die Dichtungen in der kurzen Zeit, die bis zur Landung vergeht oder während des Abwurfs selbst, von rund 140 mbar (2 psi) auf fast 1.105 mbar (16 psi) steigen lassen.

Pelican engineers knew that they needed to account for pressure differentials. The 0450 Mobile Tool Chest would be transported around the world and often dropped from an airplane. Rapid altitude changes can cause pressure on the seals to increase from about 2 psi (140 mbar) to almost 16 psi (1,105 mbar) in the short period it takes to reach the ground.