YARN COUNT :NM 90/2 *NM 90/2(Ne 53/2 * Ne 53/2)
YARN COUNT :NM 90/2 *NM 90/2(Ne 53/2 * Ne 53/2)
为使He-Ne激光器的相干长度达到2Km.他的单色性△λ/λ应为多少?(Ae-Ne激光波长λ=632.8nm)
英语翻译CORO LAB XQ CLEARED YARN COUNT NE 1/10s OE YARN NET WT .
电子电路问题0.18,90nm,65nm,28nm 在
计算:(a^m)^n*(-a^3n)^2m除以(a^nm)^5-a^2nm
纱线 支数2nm/1 to 16nm/2 是啥意思
nm
count of yarn纱支数:warp 经纱 29 tex x 1,Nm 35/1 weft 纬纱 34 tex x
fabric construction 190x100 yarn count 100/2x100/2是什么意思?
Spun polyester yarn for sewing Thread,Count :RT 40/2 and 50/
化简:mm−n−nm+n+2mnm
单位m3/s2可转换为 Nm^2/kg