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??????	?????GB/T17395<????????漲
????	1.???????????????????3~12m 2.??Σ?????????2~10.5m
??????	1.??? ??15mm????????1.5mm/m 2.???>15~30mm????????2.0mm/m 3.???>30mm??????351mm????????3.0mm/m

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			?????	???
???????????????	??	<50	?? 0.50 mm	?? 0.40mm
		??50	?? 1 %	?? 0.75 %
	???	<4	?? 12.5 % (??С????0.40mm)	?? 10 % (??С????0.30mm)
		??4~20	+15% -12.5%	?? 10 %
		>20	?? 12.5%	?? 10%
??Σ???????	??	6~10	?? 0.20 mm	?? 0.10 mm
		>10~30	?? 0.40 mm	?? 0.20 mm
		>30~50	?? 0.45 mm	?? 0.25 mm
		>50	?? 1 %	?? 0.5 %
	???	??1	?? 0.15 mm	?? 0.12 mm
		>1~3	+ 15 %, - 10 %	?? 10 %
		>3	+ 12.5, - 10 %	?? 10 %
???????????С??351mm?????????????????????? 18 %??

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30*8	???	35*6	???	40*3.5	???	45*4	???
30.3*3.3	???	35*6.5	???	40*4	???	45*4.5	???
31*2.3	???	35*7	???	40*4.5	???	45*5	???
32*1.5	???	35*8	???	40*5	???	45*5.5	???
32*2	???	35*9	???	40*5.5	???	44.5*5	????
32*2.5	???	36*1.5	???	40*6	???	45*6	???
32*3	???	36*2	???	40*6.5	???	44.5*6	????
32*3.5	???	36*2.5	???	40*7	???	45*7	???
32*4	???	36*3	???	40*7.5	???	45*7.5	???
32*4.5	???	36*3.5	???	40*8	???	45*8	???
32*5	???	36*4	???	40*9	???	45*8.5	???
32*6	???	36*4.5	???	40*10	???	45*9	???