TenPayV3DownloadBillRequestData 构造函数

public TenPayV3DownloadBillRequestData(
	string appId,
	string mchId,
	string nonceStr,
	string deviceInfo,
	string billDate,
	string billType,
	string key,
	string tarType = "GZIP",
	string signType = "MD5"
)

Public Sub New ( 
	appId As String,
	mchId As String,
	nonceStr As String,
	deviceInfo As String,
	billDate As String,
	billType As String,
	key As String,
	Optional tarType As String = "GZIP",
	Optional signType As String = "MD5"
)