Mechanical differences between sucking at the breast and sucking on the dummy can make it harder for a baby to breastfeed comfortably and effectively. (breastfeedingtoday-llli.org)
This can be put down to the vast mechanical differences such as the position change and the uneven stages. (tekkengamer.com)
Ok, the truck does come with other upgrades, but the tires are the only mechanical difference between the standard Z71 and the Z71 Trail Boss — if you consider tires a mechanical upgrade. (topspeed.com)