...们在 长期的教学中积累的丰富经验的体现,练声曲不是简 单的声音训练科目, 我们可以接触到许多经典的练声曲, 像孔空 (Concone),帕诺赋卡(Panofka),马尔切西(Marchesi), 雷金(Regine)等等.
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菱形孔空心砖 brick with lattice perforation
约瑟·孔空 Giuseppe Concone ; Concone
多孔空心砖 Perforated Brick ; perforated cellular brick
冲孔空心冲头 hollow punch
凿孔空心钻头 [机] jagged core bit
孔壁空洞 hole void
多孔层空心柱 porous-layer open-tubular column ; PIOT column ; PLOT ; tubular column
孔隙空间 pore space ; void space ; interstitial space ; void ace
纸带空孔机 paper tape punch
本机适用品种多，更换模具可制标砖、盲孔空芯砖其它异型制品。
The machine applies to varieties, molds can be prepared to replace standard bricks, blind-hole hollow brick other profiled products.
本文通过减压模型试验对积石峡水电站中孔泄洪洞平面工作闸门槽的空化问题进行了研究。
By means of depression model test, this paper researches cavitation characteristics of service gate slots for middle outlet works of Jishixia hydropower station.
执行绕机检查，确保静压孔、空速管、全空温探头没有损坏和堵塞，检查静电放电刷、雷达罩锁和迎角传感器没有损坏。
Carry out external walk around, check static ports, pitot tubes, tat probe for no damage and obstruction, check static dischargers, radome latches and Angle of attack sensors for no damage.
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