KFUPM PYP-English Technology 1 Podcasts
Speaking Option 3 (salesperson-and-customer-mobile phone)
A.  So what are you looking for?  Something strong but flexible at the same time, I guess?
B.  Yes, they can’t be brittle.
A.  They mustn’t break under stress.
B.  Exactly.
A.  Do you use steel?  That’s strong.
....(TechTalk Pre-Intermediate, Listening Script 20.1)
Tech Talk Pre-Intermediate, by Vicky Hollet and John Sydes, p.126, tapescript 20.1