Конструирование машин и оборудования металлургических производств. Основы трехмерного автоматизированного конструирования деталей и узлов машин с использованием программы Autodesk Inventor. Часть 1. Проектирование деталей

Laugh and cry. Having a good sob is reputed to be good for you. So is laughter, which has been shown to help heal bodies, as well as broken hearts. Studies in Japan indicate that laughter boosts the immune system and helps the body shake off allergic reactions.