????ä½?为å?½é??大å?????°ï??±ä¸­å»ºä?å±??¿å»º?????¥è??????ä»??³ç??ºå????å°???¸´å¤?????æ¼??ºè?å¤?å®?è£?ï¼?å·¥ç??°ä?室为ä¸?级é?²æ°´ï¼?è¿????³ç??å¿?é¡»ç??æ­£å???°â??æ»´æ°´ä¸?æ¼?????

工人正å?¨ä½¿?¨æ³¨æµ?ç®?/FONT>

?????¨æ?½å·¥è¿?ç¨?ä¸??项ç???¢é?????°å???????°ä?室å?å¢??²æ°´å·¥å?å¤?????å·¥æ???¿ï?????????ä¸????³ã??为æ?ï¼??????»å?³å?ç»????°æ?½å·¥å·¥è?ºï?????äº??½å·¥ç¼?å¯????²æ°´é¢??????¨é??????è¿?å¸þB???¨â??å¼?注æ?管æ?½å·¥??????æµ?ç­??¶ï???å°?注æ?管å?ºå?å®?è£?äº?æ··å?????½å·¥ç¼?表é??¸­?????ç½?¸¤æ®µç??£ï?å¾?æ··å????æµ?ç­?å®????¤æ¨¡?¿å??ï¼??©ç?¨ç??ç½???管å?£å?注æ?液注?¥ï?æµ?液é??è¿?管身?ºæ?å­?????æ¸??¥æ··?????½å·¥ç¼???ï¼?ç­?å¾?注æ?液å???ºå??满足?²æ°´è¦?æ±????¢å??°ä?ä¸?级é?²æ°´ï¼??????°æ?§è§£?³ä?æ··å?????½å·¥ç¼?常ç?¨æ?½å·¥?¹æ??²æ°´è´¨é??ä¸?é«???å¹´é????????ï¼???çºþ=????2.71ä¸?????