return stroke sentence in Hindi

Examples

1. Following on I'd like to ask if anyone knows how the fuel / air ( ? ) is injected into'small cylinder'following release of pressurised combusted gas into turbine as shown in third link ( C above )-there must be some sort of'tappet valve'activated on return stroke to allow recharge of fuel air mixture ? anyone know?
2. In the late-14th century Middle English alliterative poem " Sir Gawain and the Green Knight ", Sir Gawain refuses the offer of a ring from Sir Bertilak's amorous wife before accepting, instead, another circular adornment, a girdle, that will protect him from ever being killed, and which he wears when he goes to suffer a return stroke of the axe from the Knight of the Green Chapel.