Jewish ghettos 1 [vynechat] Jews 1 [vynechat] concentration camps 1 [vynechat] forced labour camps 1 [vynechat] furnaces 1 [vynechat] heat technology 1 [vynechat] holocaust (1939-1945) 1 [vynechat] koncentračné tábory 1 [vynechat] pece 1 [vynechat] persecutions 1 [vynechat] perzekúcie 1 [vynechat] pracovné tábory 1 [vynechat] refractories 1 [vynechat] tepelná technika 1 [vynechat] Židia 1 [vynechat] žiaruvzdorné materiály 1 [vynechat] židovské getá 1 [vynechat]