The Seli joint venture has completed tunnel excavation on the Passirio (Val Passiria) small hydro project in Italy with the breakthrough of the 3.7m diameter double shield universal (DSU) TBM for the headrace drive. Seli modified a Wirth double shield for the 5,885m long headrace tunnel excavation, which took 12 months to complete. Average advance during the bore was 500m per month, though inflows up to 400 l/s slowed progress at times.
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机译：Seli合资公司已经完成了意大利Passirio（Val Passiria）小型水电项目的隧道开挖工作，突破了直径为3.7m的双护盾万向（DSU）TBM掘进机的开发。 Seli为5885m长的引水隧洞开挖修改了Wirth双层盾构，该工程历时12个月完成。钻孔过程中的平均进给量为每月500m，尽管有时进水量高达400 l / s会减慢进度。
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