The mean roughness Ra matches the arithmetical mean of the absolute. values related to the profile deviation y within the reference length l. Max. profile valley depth Rmax (DIN 4768) The max. profile valley depth Rmax counts for the most significant single. roughness depths Zi within the total length lm.
Benefits. Every 500 Nectar points you redeem is Â£2.50 off your total, which means more money to spend on the goods you want. You can also save further Nectar points for each Argos purchase you make, simply by presenting your card at the checkout. Simply present your Nectar card at the till and the cashier will swipe your card to automatically deduct the points from your account (subject to system availability). 2  Any remaining balance will need to be paid in full by cash, debit or credit card on the day.
Nectar is one of the biggest loyalty schemes covering several retailers and both Sainsburyâs and BP petrol forecourts. Youâll earn one Nectar point for every litre of fuel you purchase at a Sainsburyâs or BP petrol station and two points for every Â£1 you spend in a BP or Sainsburyâs store.orrisons Miles. The Morrisons Miles scheme will give you up to 10 âmilesâ for every litre of petrol you buy. Collect 5,000 miles and youâll be rewarded with Â£5 of in-store shopping vouchers. You can sign up for the scheme at your nearest Morrisons forecourt.