Yong’in eshigining yong’inga qarshi turish vaqti asosan yong’in kengashi tomonidan belgilanadi. Shu nuqtai nazardan, A sinfidagi yong’in eshigi tomonidan ishlatiladigan yong’inga qarshi taxta odatda B sinfidagi yong’in eshigi tomonidan ishlatiladigan yong’inga qarshi taxtadan yaxshiroqdir, shuning uchun umumiy ishlash B sinfidagi yong’in eshigidan yaxshiroqdir.

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