
Stepless zaus hloov pauv lub cev muaj zog. Yooj yim rau kev khiav lag luam. Txuag zog.

Lub kaw lus nres tseem ceeb. ruaj khov thiab txhim khu kev qha. Yuav tiv thaiv cov xov paj. Nws tuaj yeem ntsia tau picot device, ntau yam weaving.

..Txhua qhov chaw yog ua nrog mechanical.precision, muaj lub zog ntev.