feature:

1, siv ntawm ib tug nyeem tas txhuas hlau yog tsis yooj yim yuav tsum tau deformed.

2, Fine milling hauv qab deg, uniqure sab saum toj nrog trademark txoj hauj lwm patent desigh.

3, humanized roj hmab kov tsim, xav tias nyiam.

4, Ob leeg tas mus tiv thaiv kom txhob muaj tej yam uas roj hmab kawg cover.

5, hauv qab yog muaj zog sib nqus.