上课把女同桌内裤摸湿,一线高清视频在线观看www国产,色综合伊人色综合网站下载,男人边吃奶摸下边免费视频,精品综合久久久久久蜜月

【Instrument introduction】

It is professionally used for high temperature pretreatment of safety helmets, and is widely used in special labor protection equipment supervision and inspection stations, building science research institutes, construction engineering inspection stations and safety helmet manufacturers.

【specification】

●Test temperature: 50℃±2℃

●Time timing range: 0~99.99 hours

●PID automatic temperature controller

●All stainless steel fin heating system

【Standards compliant】

GB/T 2812-2006 "Test Methods for Safety Helmets", GB/T 2811-2007 "Safety Helmets".