21. It provided slave labour for local industry. 22. During the Second World War, Siemens & Halske employed slave labour from concentration camps. 23. He was sent to work in the " Sonderkommando " slave labour unit. 24. All the factories used slave labour of the inmates of the Mauthausen-Gusen concentration camp. 25. The pastoral stations treated the Aboriginal workers as a cheap slave labour workforce to be exploited. 26. The two men worked undercover in order to investigate the use of slave labour in Burma. 27. As the British developed the colony for sugarcane plantations, they imported many Africans as slave labour . 28. It was established to provide slave labour for Junkers ( aircraft ) and Motorenwerk ( automotive ). 29. They discover that Jirai runs a secret cannon factory using the Ka Nan people as slave labour . 30. When cocoa prices drop, farmers in West Africa sometimes cut costs by resorting to slave labour .
