回采工作面进风顺槽距进风口50m范围内、回风顺槽距工作面50m范围内各设一净化水幕,距回风绕道口50m范围设一道净化水幕。
2023-12-01比武判断题
回采工作面进风顺槽距进风口50m范围内、回风顺槽距工作面50m范围内各设一净化水幕,距回风绕道口50m范围设一道净化水幕。
A.正确
B.错误
正确答案是A

回采工作面进风顺槽距进风口50m范围内、回风顺槽距工作面50m范围内各设一净化水幕,距回风绕道口50m范围设一道净化水幕。
A.正确
B.错误
正确答案是A