a) Ntau qhov dav dav rov qab ncoo kom tau raws li qhov xav tau kev cob qhia ntawm ntau pawg.
b) Thawj qhov siab tuaj yeem hloov kho sai sai kom tau raws li qhov xav tau ntawm cov neeg sib txawv.
c) Nrog lub zog siab engineering yas barbell raj tiv thaiv npog.
d) Extended auxiliary kov rau qhov chaw ceev.
e) Nrog limiting mechanism kom muaj kev nyab xeeb ntawm tus kws qhia.
f) Hard chrome-plated qhia bar nrog linear bearing ua rau qoj ib ce smoother.