‹เ–ิ ƒNƒŠƒ“ƒv‹เ–ิŠTŽZd—ส•\ (ˆ๎“c‹เ–ิŠ”Žฎ‰๏Žะ)


ŠJŒ๛—ฆ‚ฬ‹‚฿•๛

ŠJŒ๛—ฆ(ŠJ–ฺ€–ิห฿ฏม)‚ฬ“๑ๆ

(ŒvŽZ—แ)
1.5ƒำX10mm–ฺ‚ฬ‹เ–ิ‚ฬ๊‡
(10€11.5)X(10€11.5)=0.756
= 75.6%

ฉ ‹เ–ิป•iƒgƒbƒvƒy|ƒW‚ึ

ฉ‚f‚n ‚s‚n ‚s‚n‚o ‚o‚`‚f‚d