5 Easy Facts About clean room class Described
ฉนวนชนิดม้วนลวดตาข่ายนั้นจะไม่ทนต่อแรงกดทำให้ไม่สามารถใช้แผ่นแจ็กเก็ตหุ้มทับลงไปบนฉนวนได้ทันที จะต้องติดตั้งสเปซเซอร์
What Does fatek Mean?
)와 결합한다 (우레탄 결합). 이 반응을 이용하여 다이아이소사이아네이트에 수산기 둘을 가진 분자를 반응시키면 선상고분자(線狀高分子)가 된다. 이 고분자가 폴리우레탄이다. 일반적으로는 다이아이소시아네이트로서 톨루엔다이아이소이아네이트를, 수산기를