请问螺纹、热卷、玻璃、PP、燃油、硅铁、锰硅的主连代码是？
用88以及888为后缀的来下载都失败，99为后缀的是指数，请问主连代码应该用什么？

报错信息：（这个应该是合约的代码错导致的吧）
Traceback (most recent call last):
File "G:\veighna_studio\lib\site-packages\vnpy_ctabacktester\engine.py", line 411, in run_downloading
data: List[BarData] = self.datafeed.query_bar_history(req)
File "G:\veighna_studio\lib\site-packages\vnpy_rqdata\rqdata_datafeed.py", line 162, in query_bar_history
df: DataFrame = get_price(
File "G:\veighna_studio\lib\site-packages\rqdatac\decorators.py", line 150, in wrap
return func(args, **kwargs)
File "G:\veighna_studio\lib\site-packages\rqdatac\services\get_price.py", line 83, in get_price
df = _get_price(
File "G:\veighna_studio\lib\site-packages\rqdatac\services\get_price.py", line 167, in _get_price
df = get_price_df(
File "G:\veighna_studio\lib\site-packages\rqdatac\services\detail\get_price_df.py", line 98, in get_price_df
pf, obid_slice_map = get_minbar(order_book_ids, start_date, end_date, fields, duration, market)
File "G:\veighna_studio\lib\site-packages\rqdatac\services\detail\get_price_df.py", line 170, in get_minbar
data = get_client().execute(
File "G:\veighna_studio\lib\site-packages\rqdatac\decorators.py", line 67, in wrap
return func(args, kwargs)
File "G:\veighna_studio\lib\site-packages\rqdatac\connection_pool.py", line 27, in execute
return conn.execute(method, *args, kwargs)
File "rqdatac\connection.py", line 117, in rqdatac.connection.Connection.execute
File "rqdatac\connection.py", line 87, in rqdatac.connection.Connection._read_one_packet
rqdatac.share.errors.QuotaExceeded: Quota exceeded

你这个报错应该是试用账号登录设备超限（超过三个）或者是超过下载限额了（50MB）

今天又可以下载了，看来每天会有限额啊。。。