標題: ERT-300 / 張力計 [列印本頁] 作者: henrylin424 時間: 2011-6-30 11:21 標題: ERT-300 / 張力計 本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 + l' j) B8 {& Y+ t. u
- q9 G2 E! O& w3 |# B網球拍線張力測試器ERT 300(開箱)% e* U9 _* Z/ n; f9 }$ s2 O ERT 300 Manual 3 g/ A y* z. o* k6 M* L. qThe right tension for every type of player & m! | X' n: V; k) a6 h, l$ o 1 F( X8 d9 j5 P( Q9 F, ZDynamic Tension DT ( DT-value) / DT is the string bed stiffness 7 v. B* O) Z$ u3 mDT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact) 8 q f2 b4 T9 B% t. yDT determines the playing characteristics power and control.( I4 G' [, D& E* L( T6 z& W
Higher DT for more control / Lower DT for more power 3 ^8 f' o# ^- X& o2 m% oNot recommended to play tennis when DT below 28 1 g% R* N- S& vRestring the racquet when the DT-value has decreased by 10% to 20%! O7 U- s- j3 c
) A% O1 \% r5 |1 g( Z, `' q1 m8 D/ q% a- jLo DT 28-34 Defensive play / Club+ N8 N8 J. z" T2 z- H- {
Mid DT 35-41 Dynamic,offensive play / Club,WTA) ]$ z7 z. d' A: K# \3 i8 _# I
Hi DT 42-46 Fast,aggressive play / Club , WTA , ATP0 ~6 P+ }" X) V- k
Hi+ DT 47-54 Very fast,extremely aggressive play / ATP6 d) V) {! h T6 r& n% C
2 O% `6 e" v3 v5 XWithin the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses. 1 L% c# d$ c; u& \: [% @8 t) U& n9 y Z S j! p0 |
在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart. 3 x, a) n- l& K" Z- [: G8 H. Q8 c( d k 作者: henrylin424 時間: 2011-8-21 10:56 回復 henrylin424 的帖子 / ?/ j7 b6 ]; C3 J . l4 l- V [ c3 N7 L! N) OGamma ATS ERT 300 Tenniscomputer + M8 e% K1 M( `4 K( }# F) t. g! TTW上售價169美金,海外運費36美金 - I+ ]: f$ A/ L; p: Z# F( K