n.準(zhǔn)備工作
The problems existed in over flow dam headworks were discussed, the improving standard was stated. Gate dam headworks were recommended. 論述了溢流壩渠首工程存在的問題、改造的設(shè)計(jì)標(biāo)準(zhǔn)、閘壩結(jié)合型式渠首工程的特點(diǎn)，設(shè)計(jì)中應(yīng)注意的問題及實(shí)際工程運(yùn)用效果。
He accomplished this by separating the project in to two main parts: the headwork and the irrigation system. 是迄今世界上唯一留存，年代最久遠(yuǎn)，且不斷發(fā)揮作用的生態(tài)型無壩引水工程，景觀非常奇特。
Shenzhen Headworks Welding Equipment Co., Ltd. is a modern high-tech enterprise specializing in R&D, manufacture, sales and service of welding & cutting equipment. 深圳市恒鑫勝焊接設(shè)備有限公司是一家集焊接切割設(shè)備研發(fā)、生產(chǎn)、銷售和服務(wù)于一體的現(xiàn)代高科技民營企業(yè)。
Solid brass molded, ceramic headwork, PP knob, epoxy resin powder coating on the surface, strong acid and alkalis resistant and anti-rusty. 采用實(shí)驗(yàn)室專用化驗(yàn)龍頭，閥體采用全銅鑄模工藝制造，高強(qiáng)度陶瓷閥心，手柄為耐酸堿高強(qiáng)度聚炳烯材質(zhì)，表面經(jīng)環(huán)氧樹脂粉末高溫?zé)抗に囂幚恚w具備防酸堿及防銹特性。
Huang Jinchi, Wang Yangui, A Study on the Warping near Irrigation Headwork of the Lower Reach of Yellow River. International Journal of Sediment Research, Vol. 14, No. 2,1999. 王延貴、匡尚富、李希霞，渠道沖淤特性及灌溉方式對渠道沖淤的影響，國家自然科學(xué)基金資助項(xiàng)目交流討論會，1999年12月。
This paper introduces the determination of the calculating formula of the empty-support distance of headwork in the tunnel with large sections by using the plate theory. 文章介紹了利用薄板理論確定大斷面巷道掘進(jìn)期間的空頂距計(jì)算公式。
