尼龙拖链长度的确定
固定点在运行中间位置时
Fixed point at the centre of total travel
拖链长度的计算取决于LA/2中心点到弯曲半径的距离，这个值（b）会随着拖链节距的变化而变化，适用于尼龙拖链和钢铝拖链。
The chain length(L) is calculated by summarising the half stroke LA/2 to the nominal value(b) of the bending radius.
The value is then rounded up the multiply of the chain's pitch for nylon cable chains and to an odd multiply for steel chains.
固定点偏离运行中间时
Fixed point not positioned at the centre of total travel
拖链长度的计算取决于LA/2中心点到弯曲半径的距离，DPJ表示固定端偏离中心点的距离，这个值（b）会随着拖链节距的变化而变化，适用于尼龙拖链和钢铝拖链。
The chain length(L) is calculated by summarising the half stroke LA/2 to the nominal value(b) of the bending radius and the distance()DPJ from fixed point to center of total stroke.
The value is then rounded up the multiply of the chain's pitch for nylon cable chains and to an odd multiply for steel chains.
