ZHONGSHAN CHANGYAO MEDICAL EQUIPMENT CO, LTD.;BEIJING HENGTONG XINJIA TECHNOLOGY DEVELOPMENT CO, LTD.
发明人:
Keqiang YANG,Zhenwei MAO,Keijiron YAMAMOTO
申请号：
US16626327
公开号：
US20200113769A1
申请日:
2018.07.03
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A corrugated tube includes a hollow tube formed of several crests and several troughs connected alternately. The middle of an end face of a tail end of the corrugated tube is provided with a boss； and both a first section of a head end and a last section of a tail end of the corrugated tube are crests, with the width of both the crest of the first section of the head end and the crest of the last section of the tail end being greater than the thickness of the corrugated tube, preventing the tail end and the head end of the corrugated tube from collapsing inwards when the air pressure in the corrugated tube decreases.
