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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯
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$ }0 L7 f8 W: O1 ?網球拍線張力測試器ERT 300(開箱)" J6 [( F6 T: {) s$ M
ERT 300 Manual 1 U- U' i$ E; E# m/ b9 t. o/ s# q
The right tension for every type of player: `5 ~0 V0 ~; e8 Y
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Dynamic Tension DT ( DT-value) / DT is the string bed stiffness; u; P" I; x, z4 I2 s$ D6 E
DT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)+ j$ `0 w5 H: l3 h' D2 T+ s
DT determines the playing characteristics power and control.* E! Y* p |( i
Higher DT for more control / Lower DT for more power' ]4 N: O5 o; w: k1 J+ I
Not recommended to play tennis when DT below 28, d+ a- _6 A0 H+ e
Restring the racquet when the DT-value has decreased by 10% to 20%( P5 O. {8 e. E' v# ?, A8 g
9 A- R& q7 z) a; A) c/ w; q0 |Lo DT 28-34 Defensive play / Club( t0 K' ?: |% I, R. i
Mid DT 35-41 Dynamic,offensive play / Club,WTA
+ J3 [* y8 @2 _6 q: MHi DT 42-46 Fast,aggressive play / Club , WTA , ATP( E0 ^. A' W% Z5 R; \
Hi+ DT 47-54 Very fast,extremely aggressive play / ATP) T* @+ ]1 @: l, U
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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.# q/ m' c7 k7 z
0 v% K6 ^2 V: y( J; m" U在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.6 g; f- G) d( Z: E- B6 C
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發表於 2011-6-30 11:21:01
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