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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 ! b; {; O$ e& b; ^
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網球拍線張力測試器ERT 300(開箱)
5 P) v0 {5 a8 s4 x5 gERT 300 Manual
3 {$ \4 y/ h) SThe right tension for every type of player1 u, m1 Z+ A6 c4 E6 E
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Dynamic Tension DT ( DT-value) / DT is the string bed stiffness
+ J1 z% H4 ~# J( `! [/ @& xDT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)
/ h' g: M, F1 Z6 T" e' o l7 }8 [DT determines the playing characteristics power and control.
$ ?" h% j2 y) ~8 WHigher DT for more control / Lower DT for more power/ s+ q' p, ^6 R; B, j/ Y0 m
Not recommended to play tennis when DT below 286 u$ g- p$ S( ]! ^: [' q' ?' X3 f
Restring the racquet when the DT-value has decreased by 10% to 20%8 U& Y5 ^" q, s0 k) m
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Lo DT 28-34 Defensive play / Club# P U% l, p9 `8 w9 Z: W, `
Mid DT 35-41 Dynamic,offensive play / Club,WTA
3 Y. x8 J2 I: y/ {+ T6 h1 p# ~3 q9 GHi DT 42-46 Fast,aggressive play / Club , WTA , ATP
! q8 ?* F, j0 ]' O' s1 vHi+ DT 47-54 Very fast,extremely aggressive play / ATP
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Within the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.' a3 k8 U' J4 ]# w4 W2 k
3 W) m+ e! P8 ~) U在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.
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發表於 2011-6-30 11:21:01
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