砂心頭 的英文怎麼說
中文拼音 [shāxīntóu]
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Place the house sponge on the cinder block and place the brick with the carpenter ' s sponge, sand paper and duct tape on top of the sponge
將家用海綿放在空
心渣煤磚上（作桌子用） ，上面依次放置磚
頭、木匠用海綿、
砂紙和膠帶在海綿之上。
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In this paper, in order to solve the difficulties in the rain pipe construction in jianyu road of yulin city, the pipe - pushing technique for the hand - type tool pipe in the sand soil layer has been researched by experiments in which many practice problems were considered such as the movement and deformation of sand soil, the difficulties for the pipe to enter the scheduled work soil, the collapse of excavation surface, the departure of pipe center and the difficulties to correct this departure. by both the calculations for the stabilities of back - supporting soil body and excavation surface and the theoretical analysis on the reasons for the departure ' s producing, some construction techniques were introduced and adopted in this paper which include not only the change and reinforcement to both the back - supporting soil body and the scheduled work soil body but also the settings of pipe cap, lattice and correcting system on the head of the tool pipe
本文針對榆林市建榆路雨水管道中遇到的技術難題，進行手掘式工具管
砂土層頂管法施工技術試驗研究，在研究中考慮
砂土層存在的后靠土體移位、變形，工具管難以進入出洞土體，挖掘面易坍塌、管道中
心易偏差及難糾偏等問題，通過對后靠土體和挖掘面的穩定計算及偏差產生原因的理論分析，提出並採用后靠土體換填加固，出洞土體換填加固，以及在工具管
頭部設置管帽、格柵、糾偏系統等技術措施
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This paper analyzes and discusses the problems involving the design of the electronic control ( ec ) and numerical control ( nc ) systems for a new type nc grinder - machine used to grind planar quadratic and annular enveloping worms based on novel four - axis - interpolation, in which a central fabricating method is introduced
摘要本文作者設計了新型四聯動平面二次包絡蝸桿數控磨床的數控及電控系統，該磨床採用虛擬中
心的方法，通過兩正交軸的圓插補及磨
頭基座的自轉實現了傳統蝸桿加工磨床上的
砂輪工作面的平面回轉運動，克服了傳統加工蝸桿工作層面多，結構復雜，加工精度、效率低等缺點。
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Strengthened core print
強化砂心頭
