(defun lib_a(item_n)
  (cond
	((= 1 item_n)
	 '("模胚"		"上內(nèi)模" 		"下內(nèi)模" 		"行位" 			"鑲件" 		
	   "斜雞" 		"油板" 			"壓條" 			"撐頭" 			"即嘴"
	   "擋板" 		"定位圈"		"鎖扣" 			"\"O\"型圈"		"扣雞" 	
	   "推桿" 		"栓打螺絲"		"頂板"			"活動(dòng)臂"		"分流錐"
	   "水口司"		"垃圾釘"		"隔片"			"彈弓柱"		"中托司"        
           "中托邊"             "司筒針"		"鑲針"			"司筒"			"銷子"			
           "波子彈弓"           "喉通"		        "喉塞"			"彈弓"			"行位彈弓"		
           "鎖模塊"             "限位塊"                "斜頂"                  "斜頂桿"                "滑塊"                
           "尼龍拉勾"           "活動(dòng)臂"                "復(fù)位鍵"                "氣閥"                  "碟型彈弓")
	)
	((= 2 item_n)
	 '("MOLD BASE" 		"CAVITY INSERT" 	"CORE INSERT" 		"SLIDE" 		"INSERT" 	
	   "WEDGE" 		"WEDGE WEAR PLATE"	"PLATE" 		"SUPPORT PILLAR" 	"SPRUE BUSHING" 
	   "STOP PLATE" 	"LOCATING RING" 	"LATCH" 		"\"O\"RING"		"PARTING LOCK SET" 
	   "PUSH BAR" 		"S.H.S.B"		"ERACURETUN"		"LEVER ARM"		"SPRUE SPREADER"
	   "BUSH"		"STOP PIN"		"BUFFLE"		"SPRING ROD"		"EJECTOR GUIDE BUSH"  
           "EJECTOR GUIDE PIN"  "EJ PIN"		"PIN"			"EJECTOR SLEVE"		"DOWEL PIN"		
           "BALL CATCH"         "COUPRING"		"PIPE PLUG"		"DIE SPRING"		"DIE SPRING"		
           "LOCK PLATE"         "STOP PLATE"            "ANGLE FROM PIN"        "ANGLE EJECTOR ROD"      "SLIDE"                
           "PARTING LOCKS"      "LEVER ARM"             "EARLY RETURN BAR"      "VALVES"                 "DIE SPRING")
	)
	((= 3 item_n)
	 '(("STD" "1050")
	   ("P20" "8407" "S136H" "S136" "MEKE")
	   ("P20" "8407" "S136H" "S136" "MEKE")
	   ("P20" "8407" "S136H" "S136" "MEKE")
	   ("P20" "8407" "S136H" "S136" "MEKE")
	   ("1050")
	   ("DF2")
	   ("1050" "DF2")
	   ("1050")
	   ("STD")
	   ("1050")
	   ("STD")
	   ("1050")
	   ("STD")
	   ("STD")
	   ("S136H")
	   ("STD")
	   ("1050")
	   ("1050")
	   ("8407")
	   ("P20")
	   ("1050")
	   ("CU" "BeCu")
	   ("STD")
	   ("STD")
	   ("STD")
           ("STD")
	   ("STD")
	   ("STD")
	   ("STD")
	   ("STD")
	   ("STD")
	   ("STD")
	   ("STD")
	   ("STD")
	   ("1050")
           ("1050")
           ("STD" "P20" "8407" "S136H" "S136" "MEKE")
           ("STD")
           ("1050")
           ("STD")
           ("DF2")
           ("DF2")
           ("STD")
           ("STD"))
	)
	((= 4 item_n)
	 '((" ")
	   (" ")
	   (" ")
	   (" ")
	   (" ")
	   (" ")
	   (" ")
	   (" ")
	   ("%%C")
	   ("%%c5/8\"X65" "%%c5/8\"X80" "%%c5/8\"X90" "%%c5/8\"X100" "%%c5/8\"X110" "%%c5/8\"X120" "%%c5/8\"X140" 
           "%%c3/4\"X65" "%%c3/4\"X80" "%%c3/4\"X90" "%%c3/4\"X100" "%%c3/4\"X110" "%%c3/4\"X120" "%%c3/4\"X140" "%%c3/4\"X170" " ")
	   (" ")
	   ("%%c100X15" "%%c120X15" "%%c150X15" " ")
	   (" ")
	   ("OD16*ID12*%%c2" "OD20*ID14*%%c3" " ")
	   ("WGP3001" "WGP3000")
	   (" ")
	   (" ")
	   (" ")
	   (" ")
	   (" ")
	   (" ")
	   ("%%c16X15")
	   (" ")
	   (" ")
	   (" ")
           (" ")
	   (" ")
	   (" ")
	   ("OD*ID*L")
	   ("%%c5/32\"X1\"" "%%C1/4\"X2\"" " ")
	   ("M8" "M6" " ")
	   (" ")
	   (" ")
	   ("(扁)OD1\"*2-1/2\"" "(扁)OD1-1/4\"*2-1/2\"" "(扁)OD1-1/4\"*3\"" "(扁)OD1-1/4\"*4\"" "(扁)OD1-1/4\"*5\"")
	   ("(扁)OD1/2\"*ID9/32\"*L" "(扁)OD3/8\"*ID3/16\"*L" "(扁)OD5/8\"*ID11/32\"*L")
	   ("10X30X70")
           (" ")
           (" ")
           (" ")
           (" ")
           ("PL-401 %%c13" "PL-401 %%c16")
           (" ")
           (" ")
           (" ")
           ("%%C18X1.4" "%%C20X1.55"  "%%C25X2.05"))
	)
	((= 5 item_n)
	 '("1" "2" "3" "4" "5" "6" "7" "8" "9" "10" "11" "12" "13" "14" "15" "16" "17" "18")
	)
	((= 6 item_n)
	 '(("" "預(yù)硬HB170-220") 
	   ("" "預(yù)硬HRC29-33" "淬火HRC48-52" "氮化(Nitride)")
	   ("" "預(yù)硬HRC29-33" "淬火HRC48-52" "氮化(Nitride)")
	   ("" "預(yù)硬HRC29-33" "淬火HRC48-52" "氮化(Nitride)")
	   ("" "預(yù)硬HRC29-33" "淬火HRC48-52" "氮化(Nitride)")
	   ("" "預(yù)硬HB170-220") 
	   ("" "淬火HRC54-58") 
	   ("" "預(yù)硬HB170-220" "淬火HRC54-58") 
	   ("" "預(yù)硬HB170-220") 
	   ("" "淬火HRC46-48") 
	   ("" "預(yù)硬HB170-220") 
	   ("" "預(yù)硬HB170-220") 
	   ("" "預(yù)硬HB170-220") 
	   ("" "HASCO") 
	   ("") 
	   ("") 
	   ("")
	   ("" "預(yù)硬HRC29-33" "淬火HRC48-52" "氮化(Nitride)")
	   ("") 
	   ("" "淬火HRC48~52") 
	   ("" "預(yù)硬HRC29-33") 
	   ("") 
	   ("" "預(yù)硬HRC38-42") 
	   ("") 
	   ("" "HASCO" "D-M-E")
           ("" "HASCO" "D-M-E") 
	   ("" "HASCO" "D-M-E" "DAIDO") 
	   ("" "HASCO" "D-M-E" "DAIDO") 
	   ("" "HASCO" "D-M-E" "DAIDO") 
	   ("") 
	   ("" "HASCO" "D-M-E") 
	   ("" "HASCO" "D-M-E") 
	   ("" "HASCO" "D-M-E") 
	   ("" "HASCO" "D-M-E" "DAIDO") 
	   ("" "HASCO" "D-M-E" "DAIDO") 
	   ("" "預(yù)硬HB170-220")
           ("" "預(yù)硬HB170-220")
           ("" "淬火HRC48-52" "氮化(Nitride)")
           ("" "預(yù)硬HB170-220" "頂針代")
           ("" "預(yù)硬HB170-220")
           ("")
           ("" "淬火HRC54-58")
           ("" "淬火HRC54-58")
           ("")
           (""))
	)
	((= 7 item_n)
	 '("P20" "8407" "S136H" "S136" "DF2" "STD" "1050" "CU" "BeCu" "MEK4" "")
	)
	((= 8 item_n)
	 '("" "預(yù)硬HB170-220" "預(yù)硬HRC29-33" "淬火HRC48-52" "淬火HRC54-58" "淬火HRC38-42" "氮化(Nitride)" "")
	)
  )
)