›‰p’PŒ๊ƒNƒCƒYy‘I‘๐ŽฎF‚3E‰pŒŸ€ˆ๊‹‰E‰pŒŸ“๑‹‰z›
Ÿ‚ฟ”ฒ‚ซํƒ‚[ƒh

ก3–โ–ฺ ‰๑“šŒ‹‰สก
•sณ‰๐I
ณ@‰๐Fconcrete
Žž@ŠิF8535•b
ณ‰๐”F0–โ

‘ๆ4–โ–ฺ
ถŽYEŽYoEป์Eป‘ข
progress
process
contamination
accumulation
production


ƒƒjƒ…[‚ึ
ฤ’งํ