【正文】 e some little surprises once in a while. Once, there was something wrong with my drawer and I had plained about it unconsciously. And he fixed it for me. Then the other day, he placed several pink diamond roses beside the flower with a piece of paper saying” I love you more than I can say! Diamond stands for marriage, rose stand for love. I hope you are mine, bee my wife. You are the only girl who I really want to spend the rest of my life to stand by.” Although there were some grammar errors but I got what he meant. He meant so clear and so direct. s Day! in shops, hotels and restaurants. But few young women will mark the festival with their boyfriends, or take part in traditional activities to pray for cleverness. A largescale of exhibition on the Silk Road opened to the public in the National Museum on Thursday. The exhibition displays more than 400 treasures from Shaanxi province, Gansu province and 14 other regions. It is largest scale exhibition that shows the history of the Silk Road in recent years. Ass misery, the cow told him to turn its hide into a pair of shoes after it died. The magic shoes whisked Niulang, who carried his two children in baskets strung from a shoulder pole, off on a chase after the empress. The pursuit enraged the empress, who took her hairpin and slashed it across the sky creating the Milky Way which separated husband from wife. But all was not lost as magpies, moved by their love and devotion, formed a bridge across the Milky Way to reunite the family. Even the Jade Emperor was touched, and allowed Niulang and Zhinu to meet once a year on the seventh night of the seventh month. This is how Qixi came to be. The festival can be traced back to the Han Dynasty (206 BCAD 220). Traditionally, people would look up at the sky and find a bright star in the constellation Aquila as well as the star Vega, which are identified as Niulang and Zhinu. The two stars shine on opposite sides of the Milky Way. Customs In bygone days, Qixi was not only a special day for lovers, but also for girls. It is also known as the Begging for Skills Festival or Daughters39。Shutterbugs flock to see for themselves the marvel of splendid colors around the mountains and waters, many of whom have travel a long distance and even camp here only to capture a moment of the nature wonder. Nestled close to the country39。三、具體要求產(chǎn)品零件圖 1張產(chǎn)品毛坯圖 1張機(jī)械加工工藝過程卡片 1份機(jī)械加工工序卡片 1套課程設(shè)計(jì)說明書 1份四、進(jìn)度安排第一階段：繪制零件圖，工藝卡片（2天）第二階段：查閱資料，工藝方案比較，確定加工路線（2天）第三階段：確定各工序的加工余量和工序尺寸，計(jì)算各工序的切削用量和工時(shí)定額（3天）第四階段：整理說明書，填寫工藝卡片（3天）五、成績(jī)?cè)u(píng)定指導(dǎo)教師 簽名 日期 年 月 日系主任 審核 日期 年 月 日請(qǐng)您刪除一下內(nèi)容，O(∩_∩)O謝謝?。?！Many people have the same mixed feelings when planning a trip during Golden Week. With heaps of time, the sevenday Chinese請(qǐng)您刪除一下內(nèi)容，O(∩_∩)O謝謝?。?！National Day holiday could be the best occasion to enjoy a destination. However, it can also be the easiest way to ruin how you feel about a place and you may bee more fatigued after the holiday, due to battling the large crowds. During peak season, a dream about a place can turn to nightmare without careful planning, especially if you travel with children and older people. As most Chinese people will take the holiday to visit domestic tourist destinations, crowds and busy traffic are inevitable at most places. Also to be expected are increasing transport and acmodation prices, with the possibility that there will be no rooms available. It is also mon that you39。但是在設(shè)計(jì)過程中所學(xué)到的東西是這次畢業(yè)設(shè)計(jì)的最大收獲和財(cái)富，使我終身受益。 在整個(gè)設(shè)計(jì)過程中我懂得了許多東西，也培養(yǎng)了我獨(dú)立工作的能力和團(tuán)隊(duì)協(xié)作能力，樹立了對(duì)自己工作能力的信心，相信會(huì)對(duì)今后的學(xué)習(xí)工作生活有非常重要的影響。見《切削手冊(cè)》第三章中磨料選擇各表，結(jié)果為 平型砂輪，其尺寸為2502575（DdH）。故(2)攻M8的螺紋 由《機(jī)械加工工藝手冊(cè)》，在Z525型立式鉆床上攻絲。由Z525鉆床說明書由就近原則取n=680r/min。故由Z525型立式鉆床說明書取f=。32H7 (1)鉆孔φ15： F=～(）由于 ，故應(yīng)選孔深修正系數(shù)，KT=則: f=(～)～按Z525立式鉆床機(jī)床說明書選取 f= V=13m/min(、） 按機(jī)床選?。?n=272r/min所以實(shí)際切削速度：切量以及超切量y+△=8mm ；L=l+y+△故切削工時(shí)為 (2)擴(kuò)孔φ30 根據(jù)有關(guān)資料介紹，利用鉆頭進(jìn)行擴(kuò)鉆時(shí)，其進(jìn)給量和切削速度與同樣的尺寸的實(shí)心孔時(shí)的進(jìn)給量和切削速度的關(guān)系為： f=（～）f鉆 v=（1/2～1/3）v鉆式中：f鉆、v鉆加工實(shí)心孔時(shí)的切削用量。 6）計(jì)算基本工時(shí) 因?yàn)椴捎脤?duì)稱安裝銑刀，如切量及超切量y+Δ=20mm，則：L=l+y+Δ=124mm。=100mm，