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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯
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網球拍線張力測試器ERT 300(開箱); C2 D6 ?5 w4 \- K) p4 O3 z9 c
ERT 300 Manual 1 s3 r$ y0 B3 A) {
The right tension for every type of player
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5 g* X8 B: O! G" E; R% ^Dynamic Tension DT ( DT-value) / DT is the string bed stiffness
8 W+ v0 x0 d( p. j* ^7 wDT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)* L% O$ [* M: j8 q( w+ L5 a. \+ i
DT determines the playing characteristics power and control.# q4 _) H; S. [ ]2 o; ]4 W
Higher DT for more control / Lower DT for more power
5 @ U) ^7 j7 A5 A; @ E! D3 oNot recommended to play tennis when DT below 28; B7 D7 \" S6 _ ?+ M
Restring the racquet when the DT-value has decreased by 10% to 20%- H0 ~3 V+ f4 h# R. A# F- Z/ q1 ?
9 _, z5 O7 v3 D9 g: jLo DT 28-34 Defensive play / Club
8 I3 `7 x! p3 n8 WMid DT 35-41 Dynamic,offensive play / Club,WTA. `% v% `! J5 {# J9 q+ H z! A
Hi DT 42-46 Fast,aggressive play / Club , WTA , ATP
+ T$ X0 E* u: W% L) k$ f/ a8 cHi+ DT 47-54 Very fast,extremely aggressive play / ATP5 |9 F1 f, v3 C2 \& ~, [
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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.
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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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