B, 0 females were divided two grous, 8~0 hours spermatic before ovulate and near ovulate;
B, 0 females were divided two grous, 8~0 hours spermatic before ovulate and near ovulate;
B方法对0头母牛分为排卵前8~0h输精和接近排卵输精;
B, 0 females were divided two grous, 8~0 hours spermatic before ovulate and near ovulate;
B方法对0头母牛分为排卵前8~0h输精和接近排卵输精;