Why does Kr origin have secondary coating? Is it a matter of workmanship?
But the X-ray showed that the acetone cover was opened and passed
Can you explain it for us?
EP4CE55F23I7N Sample 1 Lot:S112MK80 Date:2113 COO:TW
EP4CE55F23I7N Sample 2 Lot:S002AF25 Date:2001 COO:KR
EP4CE6F17C8N Sample 3 Lot:S042AK5F Date:2043 COO:KR
Lot:S115AF10 Date:2113 COO:KR