(?????)???“B??????”:?????????

???????????1?????21??????(????????? ?????????????? ?????????????)“?????????50mm/s,???????????????????3°?5°,???2-5N??????????……”1??21????????????,??,?,?????????,???????????????,???

????“?????”,????????????????????????“?????????????”???????“?????????????????????????????”?????“????”????????????????????????,????????“??????????”“???”“?????????????”“?”“???????????????”?“?”????,????,???

????????“90??”,?????????????“??”10???????“?????????”,??,??“B?????”,?????????????

9???????,??,?????????,?????????????,????????,????,????????????,???????“???”?????????????????????????????????????????????????,??????????????????????????

????????,???????,??????,???????????????“?”?“??????????????”?

“??????,?????,?,??????????????,??,?,?,????,?????????????”????

??????????,?????????????????10000?????,????“???????”,????“??????”?

??,????16?,??134???????????,?465???

???????“???????????????????0.5??????????????????????????”???

????,??????,????????????250??,?????????60???????,??????????100%?(?????????????????)