If the blind guides the blind, both shall fall into a pit.
若是瞎子领瞎子，两个人都要掉到坑里。
If a blind man leads a blind man, both will fall into a pit.
若是瞎子领瞎子，两个人都要掉在坑里。——新。
The system consists of a swirling chamber, two vertical buckets on its wall, a drop shaft and a water cushion pit with one blind tunnel.
本文通过模型试验研究涡室-竖井内消能系统，用内设阻涡坎的涡室连接泄洪洞和竖井，带盲洞的消力井连接竖井和导流洞。
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