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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 / R9 L3 E" z. H, Z) w
! Q" a% t& w6 \ U, k0 A網球拍線張力測試器ERT 300(開箱)
+ t& T7 z. _5 s2 ZERT 300 Manual / W$ N: `, b/ h3 a+ n0 i2 w
The right tension for every type of player( Y& e9 i" h* d! q
, f: N9 \( k' ODynamic Tension DT ( DT-value) / DT is the string bed stiffness8 U+ @* y0 i. p( Y' e" i0 U/ o6 V2 J
DT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)
( v* @) s2 @( h% V# q$ _DT determines the playing characteristics power and control.* b3 j& u, \- C; W
Higher DT for more control / Lower DT for more power
6 G, ^6 ]+ k7 H( b! r5 ANot recommended to play tennis when DT below 28% [( T; } w" M$ j
Restring the racquet when the DT-value has decreased by 10% to 20%" p0 G8 D- R% ?5 E
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Lo DT 28-34 Defensive play / Club4 M) p( K- t4 \9 T/ F( W
Mid DT 35-41 Dynamic,offensive play / Club,WTA
. H) z* u% \# FHi DT 42-46 Fast,aggressive play / Club , WTA , ATP
! D; O" r( D) R4 i1 Z% gHi+ DT 47-54 Very fast,extremely aggressive play / ATP
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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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3 P; o. ^3 Y. o$ S在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.8 w+ v% G' K, D) e) b, y
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發表於 2011-6-30 11:21:01
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