Sign up for an Award
Participate with your entry in one of our professional or student awards.
Sign up for an awardLearn more:
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
In daily life we pull out long nails with horn hammer the nail when will be
rooted bent , And then it hit straight , It is not convenient after repeated
after test design,When a longpull out a layer,This nail won't bent.
Guangdong Industry Technical College
guangzhou, China
