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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 / z7 E" c5 Q$ s& _$ d
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網球拍線張力測試器ERT 300(開箱): U c9 P7 P' X+ z. P1 S9 I
ERT 300 Manual 8 u. H7 S! f4 ]3 |/ [' O% V+ V
The right tension for every type of player8 [, z5 P2 R4 Z2 Q( r. c2 ^
6 Y& D7 m* t9 u; G- [Dynamic Tension DT ( DT-value) / DT is the string bed stiffness$ C1 O% k9 m5 L" W# t
DT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)
8 G! M, t+ N; ?6 TDT determines the playing characteristics power and control. V1 w3 f& a0 h/ `+ ?
Higher DT for more control / Lower DT for more power% |+ K8 L+ v; u4 Z. ^4 l
Not recommended to play tennis when DT below 28
4 p: h) ~" r2 V4 WRestring the racquet when the DT-value has decreased by 10% to 20%
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; V/ m1 r% h0 L% A& G1 LLo DT 28-34 Defensive play / Club
" w: O/ j$ V/ ^# T+ T/ k7 YMid DT 35-41 Dynamic,offensive play / Club,WTA+ R% h; K! }1 R. [7 z
Hi DT 42-46 Fast,aggressive play / Club , WTA , ATP
; w- s1 r8 _* G8 O8 N7 sHi+ DT 47-54 Very fast,extremely aggressive play / ATP
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- G& g+ Y. ]+ K4 g% \- n5 FWithin the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.+ I* o7 `% j1 R+ U# ~6 k7 T5 u
# f- s; z2 g4 L4 Q, }在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.$ i& j2 A. ?* R1 U5 s% d8 B
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