4??21?????????????12*1800*8m??????????????λ????????
???????????????????<br><br>???????????????????????????????????????λ?????Э????????????г?????????????????????????????????????????????????????????????????????????????????????????????????<BR><br><br>???????????????????????3??1250??6000 32??<BR>3??1800??7500 90??<BR>4??1500??6000 32??<BR>4??1500??8000??
???????????????????
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?????????????????????????????????λ?????Э????????????г?????????????????????????????????????????????????????????????????????????????????????????????????
???????????????????????
3??1250??6000 32??
3??1800??7500 90??
4??1500??6000 32??
4??1500??8000 90??
4??1500??8000 90??
4??1800??8000 32??
5??1800??8000 21??
5??1800??8000 90??
6??1800??8000 35??
4??21?????????????12*1800*8m???????????????????λ????????
