Q: our driving wheels allow simple, efficient, low-noise and cost-effective drive design, even with problematic rolling contact drives.

A: Our driving wheels allow simple, efficient, low-noise and cost-effective drive design, even with problematic rolling contact drives.
++++++++
Q: equipment designed correctly will avoid the above pitfalls, thus facilitating safe and cost-efficient cleaning.

A: Equipment designed correctly will avoid the above pitfalls, thus facilitating safe and cost-efficient cleaning.
++++++++
Q: step 2: browse to select unreadable rar file and click on "repair" button as shown in figure b.

A:
Step 2: Browse to select unreadable RAR file and click on "Repair" button as shown in Figure B.
++++++++