有效票为同时对4个单项奖均投票，且正确输入验证码。

A vote will count as valid only if you have submitted the verification code and voted in all of the 4 categories.

根据施工质量追踪，以及观测监测表明：施工质量好，获1991年度能源部优质工程单项奖。

Thesubsequent inspection and observation revealed that the rock abuttal construction quality is excellent, and it was awarded a specific prize by Ministry of Energy in 1991.