Question: many "ordinary" speakers has got a spl of 90-93 db - a leap of 10 db.
Answer: --> Many "ordinary" speakers has got a SPL of 90-93 dB - a leap of 10 dB.

Question: lean carefully behind until you feel the stretch.
Answer: --> Lean carefully behind until you feel the stretch.

Question: alternative term oioubl_guide_currency definition an association to exchange rate between the document currency and the payment alternative currency
Answer:
--> Alternative term OIOUBL_GUIDE_CURRENCY Definition An association to Exchange Rate between the Document Currency and the Payment Alternative Currency