Máy kiểm tra nén nệm ( Testing Machine) - SECOVINA
If the is 4" thick or less, use D3574 for testing 25% IFD. D-3574 Test B1 describes the following steps... (1) Find the top of the ; measure the thickness with pressure of 4.5N (1lb). (2) Preflex 75%. (Speed: :250±25 mm/min). (3) Return to the top of the . (4) Preflex 75%. (Speed: :250±25 mm/min).
Đọc thêm