<Tr> <Td> type I </Td> <Td> - 60 </Td> <Td> - 30 </Td> <Td> - 90 </Td> <Td> 0 </Td> </Tr> <Tr> <Td> type II </Td> <Td> - 60 </Td> <Td> 120 </Td> <Td> 80 </Td> <Td> 0 </Td> </Tr> <Tr> <Td> type I' </Td> <Td> 60 </Td> <Td> 30 </Td> <Td> 90 </Td> <Td> 0 </Td> </Tr> <Tr> <Td> type II' </Td> <Td> 60 </Td> <Td> - 120 </Td> <Td> - 80 </Td> <Td> 0 </Td> </Tr>

Difference between type1 and type 2 beta turns