master 38In Master work centers, the operators is protected through doors that grant: Hh degree of safety; Isolation of machine’s moving parts; A clean work environment (water and production scrapsIELTS MASTER > IELTS Reading Test 38. The context, meaning and scope of tourism. ... 38 The Lapita learnt to predict the duration of El Ninos. 39 It remains unclear why the Lapita halted