force 1 [vynechat] loose masses 1 [vynechat] materials science 1 [vynechat] mechanika tuhých telies 1 [vynechat] náuka o materiáli 1 [vynechat] pressure 1 [vynechat] sila 1 [vynechat] solid-state mechanics 1 [vynechat] sypké hmoty 1 [vynechat] technology 1 [vynechat] technológia 1 [vynechat] tlak 1 [vynechat]