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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 " r1 |" b7 I* V
: Q0 _) w5 M6 { c% p. X網球拍線張力測試器ERT 300(開箱)
& W. D% s7 K5 J6 @ERT 300 Manual : _, c0 p l9 R' ~
The right tension for every type of player. Y" S+ t6 {4 L K) V
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Dynamic Tension DT ( DT-value) / DT is the string bed stiffness
: T0 J% b" m2 i' ^1 e$ h1 YDT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)
0 W. a7 ?) y0 X' s- F- l$ TDT determines the playing characteristics power and control.0 h) t/ w+ ~$ Q" O' h* `, x
Higher DT for more control / Lower DT for more power; Y# [) s3 y+ m! ?+ S) I
Not recommended to play tennis when DT below 28
Q2 j, q. j0 K1 e7 K1 ~2 }+ dRestring the racquet when the DT-value has decreased by 10% to 20%
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/ [. t4 L8 _1 p* \( M9 k+ LLo DT 28-34 Defensive play / Club: a3 u% G0 f, x8 ?& H9 b
Mid DT 35-41 Dynamic,offensive play / Club,WTA1 b5 [; t) N/ d3 L& ?5 z
Hi DT 42-46 Fast,aggressive play / Club , WTA , ATP! g% H8 }, f' H; k
Hi+ DT 47-54 Very fast,extremely aggressive play / ATP
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- C4 y" D, a3 D. M. j' `Within the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.) Y$ A6 @* K! f A
+ I: }) ?: P. r6 P& ?7 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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