49830 A6 B6 經濟部中央標毕局Μ工消5'合作·吐-印製 五、發明説明（1 ) 〔產業上之利用領域〕 本發明係有關遮音性優異之空冷式內燃機引擎之冷卻 風採入用進氣口開口構造。 〔先前之技術〕 以屛蔽覆蓋內燃機放熱部，自形成於該屛蔽之冷卻風 採入開口以曲軸一體之風扇旋轉將冷卻風導入屛蔽內部， 以冷卻前述放熱部之速克達型機車用空冷式內燃機中，爲 遮音及不致將外部兩水導入屛蔽內，如日本實公昭6 3 _ 3 2 9 0 3號公報圖示，將自內側向外側自上方向下方傾 斜之鰭片沿上下方向以所需間隔平行配設而成之百葉窗， 設於屛蔽冷卻風採入開口。 〔欲解決之課題〕 前述公報之屛蔽，爲了以低價擴大鰭片寬度，將排列 於該百葉窗鰭片延長面上之具有鰭片之別體外側百葉窗以 裝卸自如安裝於與屛蔽一體之內側百葉窗外側，雖擴大鰭 片寬度可確實防止兩水侵入屛蔽內，惟自內燃機及冷卻風 扇發出之噪音，即使鰭片寬度再大，勢將沿鰭片洩出外方 致有無法獲得充份遮音效果之缺失。 〔解決課題之方法及作用效果〕 本發明係有關消除此種缺失之空冷式內燃機引擎之冷 卻風採入用進氣口開口構造之改良，係以屛蔽稷蓋內燃機 . ^ ί .……-----................................................................^......................•玎.....................^ <請先閱讀背面之注意事項再蜞寫本頁) 衣扶張尺度適用中萏a家標準！ CNS)甲4規格（210 X 297公釐1 s濟都t央標筚局員工消费合作社印¾ -49830 A6 _B6__ 五、發明説明（2 ) 放熱部，自該形成於屛蔽之冷卻風採入用開口以冷卻風扇 之旋轉將冷卻風導入屛蔽內部以冷卻前述放熱部之空冷式 內燃機引擎，其特微爲在前述冷卻風採入用開口，形成外 側百葉窗及內側百葉窗，使該外側百葉窗之傾斜方向與該 內側百葉窗之傾斜方向爲不同方向。 本發明由於改變外側百葉窗與內側百葉窗之傾斜方向 ，故內燃機及冷卻風扇產生之噪音音波大半以前述內側百 葉窗遮蔽，通過該內側百葉窗之鰭片間之噪音音波則由與 前述內側百葉窗之傾斜方向不同之外側百葉窗遮蔽，結果 ，可得充份高之遮音效果。 又將本發明適用之空冷式內燃機露出車體外側面裝載 之小型車輛，係如申請專利範圍第2項記載，將前述外側 百葉窗自內側向外側自上方向下方傾斜，將該內方之內側 百葉窗係自內側向外側自後方向前方傾斜，則可由前述外 側百葉窗阻止車體外之降雨侵入屛蔽內，並由前述內側百 葉窗將車體外側自前向後流之行駛風自前述冷卻風採入用 開口導入前述屛蔽，更增加冷卻效果。 〔實施例〕 茲說明圖示本發明之一實施例。 裝於速克達型機車1之擺動式動力組2係將前方有空 冷式內燃機3稍向後方傾斜狀態樹立之空冷式內燃機3， 及自其下部一側向後延長之三角皮帶式無段變速機4相互 結合成一體而成，將後車輪5 —體嵌裝於三角皮帶式無段 (請先閱讀背面之注意事項再填寫本頁) 裝 .訂 .線.49830 A6 B6 Ministry of Economic Affairs, Central Standard and Bilateral Bureau, Mgongxiao 5 'Cooperation · Spit-printing 5. Description of the invention (1) [Industry application field] The present invention relates to the cooling air intake of air-cooled internal combustion engine with excellent sound insulation Constructed with an air inlet opening. [Prior technology] The heat release part of the internal combustion engine is covered with a hood, and the cooling air inlet formed in the hood is collected. The fan integrated with the crankshaft rotates the cooling air into the hood to cool the aforesaid heat release unit. In the air-cooled internal combustion engine, in order to shield the sound and prevent the external water from being introduced into the hood, as shown in the Japanese Shigongzhao 6 3 _ 3 2 9 0 3 bulletin, the fins inclined from the inside to the outside from the top to the bottom downward along the up and down The blinds, which are arranged in parallel at the required intervals in the direction, are set at the opening of the cooling air inlet. [Problem to be solved] In order to expand the width of the fins at a low price, the outer louvers with fins arranged on the fin extension surface of the louver are installed on the integrated body with the hood in order to freely disassemble the fins at a low price. Although the width of the fins on the inside of the louver is enlarged to prevent the two waters from intruding into the shell, the noise from the internal combustion engine and the cooling fan, even if the width of the fin is too large, it will leak out along the fin and may not get enough. The lack of sound blocking effect. [Methods and effects to solve the problem] The present invention relates to the improvement of the air intake opening structure for the cooling air intake of the air-cooled internal combustion engine that eliminates such a defect, and the internal combustion engine is covered by the hood. ^ Ί .......-- ---.................................................. ................ ^ ....................................................... ............. ^ < Please read the precautions on the back before writing this page) The standard of Yifu Zhang applies to the Chinese standard! CNS) A 4 specifications (210 X 297 mm 1 s, Jidu t, Central Standard, Bureau of Consumers ’Cooperative Printing ¾ -49830 A6 _B6__ V. Description of the invention (2) The heat release part, which should be formed for the cooling air collection of the shelter The opening uses the rotation of the cooling fan to introduce cooling air into the hood to cool the air-cooled internal combustion engine of the heat-dissipating part. The opening is used for the cooling air intake to form the outer louver and the inner louver, so that the inclined direction of the outer louver The inclination direction of the inner shutter is different from that of the inner shutter. Since the inclination direction of the outer shutter and the inner shutter is changed in the present invention, most of the noise sound waves generated by the internal combustion engine and the cooling fan are covered by the inner shutter, and the noise between the fins of the inner shutter is passed The sound wave is covered by the outer blinds that are different from the tilt direction of the inner blinds, and as a result, a sufficiently high sound blocking effect can be obtained. Also, the small air-cooled internal combustion engine applicable to the present invention is exposed outside the outer side of the car body, such as applying for a patent According to the second item of the scope, the aforementioned outer louver is downward from the inside to the outside from the top Oblique, tilt the inner inner blinds from the inner side to the outer back to the front, then the outer blinds can prevent the rain outside the vehicle from intruding into the shelter, and the inner blinds can drive the outer side of the car body from front to back Wind is introduced from the cooling air intake opening to the hood, which increases the cooling effect. [Embodiment] One embodiment of the present invention is illustrated below. The swinging power pack 2 installed in the Sukoda locomotive 1 is forward The air-cooled internal combustion engine 3 with the air-cooled internal combustion engine 3 inclined slightly to the rear and the V-belt stepless speed changer 4 extending backward from the lower side are integrated with each other, and the rear wheels 5 are embedded in one body V-belt type stepless (please read the precautions on the back before filling out this page) binding, binding, thread.
本纸張尺度適用中S國家標準（CNS)甲4規格（210x297公釐I A6 B6 49830 五、發明説明（3 ) 變速機4之輸出軸（未圖示），該擺動式動力組2前方位 S之吊架部6係上下搖動自如裝於自速克達型機車1之車 體7向後方突出之托架8。 又旋轉自如樞支於空冷式內燃機3之油底般9之曲軸 10左端，設有三角皮帶式無段變速機4之驅動可變皮帶 輪11 ，將三角皮帶13懸掛於榧支於變速箱12後部之 未圖示被動可變皮帶輪與驅動可變皮帶輪11 ’隨著曲軸 10之轉數增大，三角皮帶式無段變速機4之變速比無段 減少，將空冷式內燃機3之動力經三角皮帶式無段變速機 4俥遞至後車輪5。 更在油底殼9上方之汽缸1 4及其上方之汽缸蓋1 5 ，以所定間隔形成多數放熱鰭片1 6 ，又將發電機1 7之 轉子1 8 —體嵌裝於曲軸1 〇右端，並將離心式冷卻風扇 1 9 —體裝於該轉子1 8 ° 又覆蓋空冷式內燃機3及冷卻風扇19之合成樹脂製 屛蔽2 0係由菝蓋空冷式內燃機3之冷卻風扇1 9及汽缸 1 4之汽缸側屛蔽2 1 ，及覆蓋汽缸蓋1 5之頂側屛蔽 2 2 ，及覆蓋汽缸側屛蔽2 1外側之屛蔽外板2 3而成， 而汽缸側屛蔽2 1及頂側屛蔽2 2係以安裝螺栓2 4以裝 卸自如裝於油底殻9及汽缸14等。 而且在汽缸側屛蔽21形成與冷卻風扇19同心狀之 圓筒狀開口 2 5，並在該圓筒狀開口 2 5形成內側百葉窗 2 6 ，該內側百葉窗2 6係自內側向外側自後方向前方傾 斜，沿前後方向以大間隔排列寬度大之鰭片2 7而成，又 (請先閱讀背面之注意事項再填寫本頁) -裝 .,π 經濟部中央櫺準局員工消费合作社印製 本紙張尺度適用中1國家標準丨CNS)甲4規格（210x297公鳘） 249830 A6 B6 經濟部中央標準局W工消費合作社印製 五、發明説明（4 ) 在屛蔽外板也形成密接汽缸側屛蔽2 1之圓筒狀開口 2 5 外周面突出外側方之園筒狀開口 2 8，並在該圚筒狀開口 2 8形成外側百葉窗2 9，該外側百葉窗2 9係自內側向 外側自上方向下方傾斜沿上下方向以狹窄間隔排列寬度較 窄之鰭片3 0構成。 而在汽缸側屛蔽21，形成上方1處，下方2處突出 外側方之安裝座3 1 ，並在屛蔽外板2 3與安裝座3 1對 應處也形成突出內側之安裝座3 2 ，在汽缸側屛蔽2 1 ， 屛蔽外板2 3間沿除圓筒狀開口 2 5，2 8之側面全部介 裝如聚氨酯海棉之吸音材料3 3，將鉚釘3 4嵌裝於安裝 座3 1 ，3 2 ，將汽缸側屛蔽2 1 ，屛蔽外板2 3相互結 合成一體，由冷卻風扇1 9之旋轉自屛蔽外板2 3之圓筒 狀開口 2 8經汽缸側屛蔽2 1之圓筒狀開口 2 5吸入屛蔽 2 0內之冷卻空氣在通過屛蔽2 0內之冷卻空氣通路3 8 時，接觸放熱鰭片1 6 ，流入汽缸蓋1 5側後，由頂側屛 蔽2 2左側後方之冷卻排風口 3 5放出大氣中。 又，在汽缸側屛蔽21如圖4所示，包圍圓筒狀開口 2 5外周設有多數孔3 6，自該孔3 6向冷卻空氣通路 3 8內露出吸音材料3 3。 更在包圍汽缸側屛蔽2 1之園筒狀開口 2 5外周所設 之孔3 6間外面，3處突設複數個四角錐狀卡合突起3 7 c，3 7 d，3 7 e，以該卡合突起3 7固定吸音材料 3 3 。 由於圇示實施例構成如前述，故空冷式內燃機3開始 * ί ^ ..............-.…-……-.................................................装......................訂.....................線 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中31國家標準（CNS)甲4规格（210X297公釐） -49830 A6 B6 經濟部中央標準局8工消費合作社印製 五、發明説明（5 ) 運轉，旋轉冷卻風扇1 9時，擺動式動力組2之右側外方 外氣自屛蔽外板2 3之圓筒狀開口 2 8經汽缸側屛蔽2 1 之圓筒狀開口 2 5導入屛蔽2 0內之冷卻空氣通路3 8 ， 接觸汽缸1 4及汽缸蓋1 5之放熱風扇1 6熱交換，自冷 卻排風口 3 5排出屛蔽2 0外，使汽缸1 4及汽缸蓋1 5 得以充份冷卻。 又由於空冷式內燃機3之運轉即使空冷式內燃機3及 冷卻風扇1 9產生噪音，惟冷卻空氣通路3 8內之噪音由 覆蓋空冷式內燃機3及冷卻風扇1 9之屛蔽2 0遮閉，並 以由孔3 6露出冷卻空氣通路3 8內之吸音材料3 3吸音 ，顯著降低擺動式動力組2外之噪音水平。 更在前述圓筒狀開口 2 5，2 8中內側百葉窗2 6之 鰭片2 7與外側百葉窗2 9之鰭片3 〇之傾斜方向不同， 故通過內側百葉窗2 6之鰭片2 7間之噪音音波，以外側 百葉窗2 9之鰭片3 0改變方向，故可提高噪音之遮閉效 果，更可減低空冷式內燃機3及冷卻風扇1 9產生之噪音 之噪音水平。 更又因將外側百葉窗2 9之鰭片3 0自內側向外側自 上方向下方傾斜，故可使上方下降之雨水自鐘片3 0之各 下綠降落於車外，而盡可能防止雨水侵入冷卻空氣通路 3 8內。 而且由於使內側百葉窗2 6之鰭片2 7自內側向外側 自後方向前方傾斜，故可使自前方向後方流路擺動式動力 組2右側通過外側百葉窗2 9之鰭片3 〇間之行駛風稹極 一請先閱讀背面之注意事項再填寫本頁一 .裝 .、ΤΓ -線. 本紙法尺度適用中國國家標準（CNS)甲4規格（210X297公釐） ^49830 A6 B6 沒濟部中夾標準局Μ工消f合作社印製 五、發明説明（6 ) 導入冷卻空氣通路3 8內，增大冷卻空氣流童，更可增大 冷卻效果。 圖示之簡單說明： 圖1 :具有本發明有關空冷式內燃機冷卻風採入用進 氣口（屛蔽）開口構造之速克達型機車之後部右側面圖。 圖2 :圖1之沿Π — II線截斷之縱斷面圇。 圖3 :圖1之屛蔽（進氣口）外板之要部擴大側面圖 〇 圖4 :圖1之汽缸側屛蔽（進氣口）之擴大側面圖。 圖5 :圖4之沿V — V線截斷之斷面圖。 〔符號說明〕 1……速克達型機車，2……擺動式動力組，3…… 空冷式內燃機，4……三角皮帶式無段變速機，5……後 車輪，6 ......吊架部，7 ......車體，8 ......托架，9 ...... 油底殻，1 0……曲軸，1 1……驅動可變皮帶輪，1 2 ......變速箱，1 3 ......三角皮帶，1 4 ......汽缸’ 1 4… …汽缸蓋，1 6……放熱鰭片，1 7……發電機，1 8… ···轉子，1 9 ......冷卻風扇，2 0 ......屛蔽（進氣口）， 2 1……汽缸側屛蔽（汽缸側進氣口），2 2 ......頂側屛 蔽（頂側進氣口），2 3……屛蔽（進氣口）外板，2 4 ......安裝螺栓，2 5……圓筒狀開口，2 6……內側百葉 窗，2 7……鰭片，2 8……圓筒狀開口，2 9……外側 百葉窗，3 0……鰭片，3 1……安裝座，3 3……吸音 { ^ ...............-..........^......................•玎............................^ (請先閱讀背面之注意事項再填寫本頁) 本纸張尺度適用中國國家標準（CNS)甲4規格（210x 297公釐） <-49830 A6 ___B6 五、發明説明（7 ) 材料，3 4……鉚釘，3 5……左側開放端，3 6……孔 ，3 7……卡合突起，3 8……冷卻空氣通路。 (請先閱讀背面之注意事項再填寫本頁) 裝 .'可 線 經濟部中央標準局：S工消#合作杜印製 本紙張尺度適用中國國家標準（CNS)甲4規格（210X 297公釐1The size of this paper is applicable to China National Standard (CNS) A 4 specifications (210x297mm I A6 B6 49830. V. Description of the invention (3) The output shaft of the transmission 4 (not shown), the swinging power group 2 front The hanger part 6 of S is a bracket 8 protruding back and forth which is mounted on the body 7 of the Zhedda locomotive 1 and can be pivoted to the left end of the crankshaft 10 like the oil bottom of the air-cooled internal combustion engine 3 , With variable drive pulley 11 of V-belt type stepless speed changer 4, suspending V-belt 13 on the back of the gearbox 12 (not shown) passive variable pulley and drive variable pulley 11 ′ along with crankshaft 10 As the number of revolutions increases, the transmission ratio of the V-belt stepless speed changer 4 is steplessly reduced, and the power of the air-cooled internal combustion engine 3 is delivered to the rear wheels 5 through the V-belt stepless speed changer 4. More in the oil pan 9 The upper cylinder 14 and the cylinder head 15 above form a plurality of heat dissipation fins 16 at a predetermined interval, and the rotor 18 of the generator 17 is embedded in the right end of the crankshaft 10, and the centrifugal cooling Fan 1 9-body mounted on the rotor 18 ° and covers the air-cooled internal combustion engine 3 and cold The synthetic resin casing 20 of the fan 19 is composed of the cooling fan 19 and the cylinder side casing 2 1 of the air-cooled internal combustion engine 3 and the cylinder 14 covering the cylinder head 15 and the top casing 2 2 covering the cylinder head 15, and It is formed by covering the outer shell 2 3 of the outer side of the cylinder side shell 2 1, and the cylinder side shell 2 1 and the top side shell 2 2 are installed with bolts 4 4 to be detachably mounted on the oil pan 9 and the cylinder 14 Moreover, a cylindrical opening 25 is formed concentrically with the cooling fan 19 on the cylinder side shell 21, and an inner louver 2 6 is formed in the cylindrical opening 25, and the inner louver 26 is formed from the inner side to the outer side. The front direction is inclined forward, and the wide fins 27 are arranged at large intervals in the front and back direction. (Please read the precautions on the back before filling out this page)-installed., Π Central Ministry of Economic Affairs Employee Consumer Cooperative The size of the printed paper is applicable to the 1 national standard 丨 CNS) A 4 specifications (210x297 male pagoda) 249830 A6 B6 Printed by the Central Bureau of Standards of the Ministry of Economic Affairs W Industrial and Consumer Cooperatives 5. Description of the invention (4) The outer cover is also formed in close contact Cylinder side shell 2 1 Cylindrical opening 2 5 Cylindrical shape with outer peripheral surface protruding outside A mouth 28, and an outer louver 2 9 is formed in the tubular opening 28, the outer louver 29 is inclined from the inside to the outside from the upper direction to the lower direction, and the narrow width fins 30 are arranged at a narrow interval in the up and down direction . On the cylinder side shell 21, there are formed an upper part 1 and a lower 2 part to protrude from the outer side of the mounting seat 3 1, and also form a protruding inner side mounting seat 3 2 at the corresponding position of the outer shell 2 3 and the mounting seat 3 1, On the cylinder side, there are 2 1 and 2 outer shells, 3 and 3, except for the cylindrical openings 2 5 and 2 8, all of which are filled with sound-absorbing materials such as polyurethane sponge 3 3, and the rivets 3 4 are embedded in the mounting base. 3 1, 3 2, the cylinder side shell 2 1 and the shell outer plate 2 3 are integrated with each other, and the cooling fan 19 rotates from the cylindrical opening 2 3 of the shell outer plate 2 8 through the cylinder side shell The cylindrical opening 2 5 of the shield 2 1 sucks the cooling air in the shield 2 0 through the cooling air passage 3 8 in the shield 2 0, contacts the heat dissipation fins 1 6 and flows into the cylinder head 15 side. The top side is covered with 2 2 cooling vents on the rear left side 3 5 are released into the atmosphere. In addition, as shown in FIG. 4, a plurality of holes 36 are formed in the cylinder side shell 21 surrounding the cylindrical opening 25, and the sound absorbing material 3 3 is exposed from the hole 36 into the cooling air passage 38. In addition, there are 3 holes in the outer periphery of the cylindrical opening 2 5 surrounding the cylinder side cover 2 1 and 5 holes provided in the outer periphery. There are a plurality of quadrangular pyramidal engagement protrusions 3 7 c, 3 7 d, 3 7 e at three locations, The sound-absorbing material 3 3 is fixed by the engaging protrusion 37. Since the embodiment shown in the figure is constructed as described above, the air-cooled internal combustion engine 3 starts * ί ^ ..............-....-......-........... ................................ Pretend .............. ........... order ..................... line (please read the precautions on the back before filling this page) Applicable to 31 National Standards (CNS) A4 specifications (210X297 mm) -49830 A6 B6 Printed by the Central Standards Bureau of the Ministry of Economic Affairs, Labor and Consumer Cooperatives 5. Invention description (5) Operation, rotating cooling fan 19 hours, swinging power The outside air on the right side of the group 2 is introduced from the cylindrical opening 2 8 of the outer shell 2 3 through the cylindrical opening 2 1 of the cylinder side shell 2 1 into the cooling air passage 3 8 in the outer shell 2 8 to contact The heat-dissipating fan 16 of the cylinder 14 and the cylinder head 15 exchanges heat, and the cooling air outlet 35 discharges out of the mask 20, so that the cylinder 14 and the cylinder head 15 can be fully cooled. Also, due to the operation of the air-cooled internal combustion engine 3, even if the air-cooled internal combustion engine 3 and the cooling fan 19 generate noise, the noise in the cooling air passage 38 is covered by the choking 2 0 covering the air-cooled internal combustion engine 3 and the cooling fan 19, and The sound absorption material 3 3 in the cooling air passage 38 exposed through the holes 36 absorbs sound, which significantly reduces the noise level outside the swing type power group 2. Furthermore, in the aforementioned cylindrical openings 25, 28, the inclination directions of the fins 2 7 of the inner shutters 2 6 and the fins 30 of the outer shutters 2 9 are different, so the fins 2 7 passing through the inner shutters 26 The noise sound waves are changed by the fins 30 of the outer shutters 29, so the noise blocking effect can be improved, and the noise level of the noise generated by the air-cooled internal combustion engine 3 and the cooling fan 19 can also be reduced. Furthermore, because the fins 30 of the outer shutters 29 are inclined from the inside to the outside and from the top to the bottom, the rainwater falling from above can be dropped from the green of the clocks 30 to the outside of the car, and the rainwater can be prevented from entering the cooling as much as possible. Air passage 38. Moreover, since the fins 2 7 of the inner shutters 26 are inclined from the inner side to the outer front, the right side of the oscillating power group 2 from the front to the rear flow path can pass through the fins 3 of the outer shutters 29 Zhen Jiyi, please read the precautions on the back and then fill in this page 1. Pack., ΤΓ-line. The standard of this paper is applicable to China National Standard (CNS) A 4 specifications (210X297mm) ^ 49830 A6 B6 Printed by the Standards Bureau, Mgongf Co., Ltd. 5. Description of the invention (6) Introduced into the cooling air passage 38 to increase the cooling air flow rate and increase the cooling effect. Brief description of the figures: Fig. 1: Rear right side view of a Sukoda locomotive with an air inlet (chao-shaded) opening structure for cooling air intake of an air-cooled internal combustion engine of the present invention. Figure 2: The longitudinal section of Figure 1 cut along the line II-II. Figure 3: The enlarged side view of the main part of the outer shell (inlet) of Figure 1 〇 Figure 4: The enlarged side view of the shell (inlet) of the cylinder side in Figure 1. Figure 5: The cross-sectional view taken along line V-V of Figure 4. [Explanation of symbols] 1 ... Sukada locomotive, 2 ... Oscillating power pack, 3 ... Air-cooled internal combustion engine, 4 ... V-belt stepless speed changer, 5 ... Rear wheels, 6 ... .. hanger part, 7 ...... body, 8 ...... bracket, 9 ...... oil pan, 10 0 ... crankshaft, 1 1 ... variable drive Pulley, 1 2 ...... gearbox, 1 3 ...... V-belt, 1 4 ...... cylinder '1 4 ...… cylinder head, 1 6 …… radiating fins, 1 7 ... generator, 1 8 ... · rotor, 1 9 ...... cooling fan, 2 0 ... choking (intake), 2 1 ... choking on the cylinder side ( Cylinder side air inlet), 2 2 ...... Top side hood (top side air inlet), 2 3 ...... Cock hood (air inlet) outer plate, 2 4 ...... Installation Bolts, 2 5 ... cylindrical openings, 2 6 ... inner shutters, 2 7 ... fins, 2 8 ... cylindrical openings, 2 9 ... outer shutters, 3 0 ... fins, 3 1 …… Mounting base, 3 3 …… Sound absorption {^ ...............-.......... ^ ........... ........... • 玎 ......................... ^ (Please read the notes on the back first (Fill in this page again) This paper The scale is applicable to the Chinese National Standard (CNS) A 4 specifications (210x 297 mm) < -49830 A6 ___B6 V. Description of the invention (7) Material, 3 4 ... rivets, 3 5 ... left open end, 3 6 ... Holes, 3 7 ... engagement protrusions, 3 8 ... cooling air passage. (Please read the precautions on the back and then fill out this page) Install. 'The Central Bureau of Standards of the Ministry of Economic Affairs: S 工 消 # Cooperation Du printed. The paper size is applicable to China National Standards (CNS) A 4 specifications (210X 297 mm 1